I recently upsized an Access 2010 database to use SQL 2005 as the back end database using SSMA for Access. The migration was completed without problems but now users are getting a write conflict anytime they try to change something, even text in a description field. SSMA inserted a timestamp field in each table, which I thought would prevent the write conflicts. Is there something I need to do to Access to force it to use the timestamp field?
The error is:
"This record has been changed by another user since you started editing it. If you save the record, you will overwrite the changes the other user made."
While researching this I've tried other approaches such as setting BIT or REAL fields to NOT NULL and inserting default values. This made no change to the issue. The write conflict even happens when updating an Nvarchar(MAX) field. I changed that field to Nvarchar(255) but the error still occurred.
I should point out that Access is using a workgroup mdw file for security.
Can anyone help point me in the correct direction? I've done several of these migrations before but never had this problem.
Thanks,
Joe
Ensure that that bit columns don't allow null. Ensure such bit columns have default set of false (0). Ensure All tables have a timestamp. Ensure that all tables have a have a primary key.
Related
I have spent two days researching and try to fix my issue with access form edits. I understand that there may be similar questions out there, but none of the suggestions fixed my problem. Also, my situation might be slightly different.
I'm on Access 2017 and using an access split form that is tied to a linked table that is on sql server 2017. I have an add button that simply adds the record entered and moves to a new record. When I add a record to my form and then try to edit it in the datasheet view on my split form I get a write conflict error.
I've already validated that I have a primary key on my table and that there are no null bit fields.
The other thing to note is that this started happening after migrating from SQL server 2014 to sql server 2017.
One thing I read about and have yet to try because of the "drastic" change it entails is to set the compatibility level of my database to something lower like SQL 2014. This would be a last resort however and would only be to validate what the cause of the error might be.
I've tried everything on this page that is applicable to my situation: http://www.accessrepairnrecovery.com/blog/fix-ms-access-write-conflict-error
What else can I try to resolve this? I'm hoping someone out there has run into something similar.
First this question has been answered 100's of time on stack overflow.
Next up: Your link has nothing to do with using SQL server, so the suggests likely will not help.
The main causes (repeated over and over as solution) when using Access and SQL server are:
Ensure that all tables have a PK defined.
Ensure that any bit fields have a default setup on sql server (usually 0)
Ensure that each table has a timestamp field.
This is important, espeically if you have any floating or "real" data type columns. The Access up-sizing wizard, and the migration tool for Access both by default suggest and will add the timestamp field.
If you missing any of the above 3 issues (that have been repeated over and over for the last 18 years on near every article about using SQL server.
So, you will ensure that you checked above all 3 issues.
After any table changes, you will re-link the access client side.
You then need to test/check if you can change edit data using the linked table directly from access (in table view). if you can edit such data directly, then you are back to testing with your form. If the form still causes a write conflict, then suggests in the article you linked to will START to apply, but not until such time you address and ensure all 3 above steps are issues are dealt with.
The time stamp is often required for a sub form, and also when you have real/floating columns. Due to rounding errors in such computer numbers, then the compare between the two records fail. The adding of the timestamp column fixes this issue since access now does not have to do a field by field compare, but will use the timestamp column (not to be confused with a datetime column) to figure out if record has been changed. Thus adopting this feature even reduces the network chatter from client to server and allows access to determine if server record been changed without having to resort to a field by field compare.
I recently encountered the same error and it turned out to be that I had an active sort on the datasheet view. Once I removed the sort, voila, problem solved! (Nothing like shooting myself in the foot.)
I was working on an application that uses ms access 2010 and oracle. Now I am working on using my sql 5.7 instead of oracle.
But the code in ms access contains recordset.edit and then 2 set statements followed by recordset.update.
recordset.edit
recordset.Fields(22).value=1
recordset.update
This gives run time error 3197. You and another user are attempting to change the same data at same time.
I have tried to match all data types. But nothing seems to work. Still i get same error.
Appreciate your help. Thanks in advance
This “other” user message is often misleading, and in fact another user has not updated the record.
Two things to check for:
If some sql update, or recordset code “may” update the current record you are working on, then force a disk write and thus no pending updates exist:
Eg:
If me.Dirty = True then me.Dirty = false.
YOUR code here such as above is now called/run
The 2nd common issue is null bit columns. These often confuse access, and thus you need to MAKE SURE at the SERVER level you have a default set for such columns (a value of 0 for sql server – not sure if same for MySQL). So this is a MUST check issue.
Next up:
Make sure the table in question has a PK, and you should add a row version (timestamp). This type of column is NOT to be confused with a date time, or a column to hold current time – it is a row version column. So add a timestamp column, make sure PK column exists, and make sure any bit (true/false) column in the table has a default. If existing bit columns have null values, then run update query to set them all false (0).
After you make the table changes (if required), then re-link all your access tables.
The above should cover 99% of the cases when you get that “other” user message when in fact you are sure it is not another user.
I created a pair of Access (365) files. One is a front-end with forms, the other is all tables. I then migrated the tables over to SQL Server (2008 R2) on a remote machine. I got the front-end to talk to the SQL server instance using an ODBC connection. I have several screens which work on the tables, some are bound to the tables, some are unbound.
I can update data in existing records and I can remove records, but I can't insert any. This is happening on both bound and unbound forms. I saw posts that said I needed to:
-Set a default of ((0)) for all BINARY fields and set so that they can accept blanks,
-Change all NVarchar() fields to Varchar() fields, and
-make sure every table has a timestamp field.
I did all of those, but no luck. Any thoughts? Thanks!
Oh, yeah, I also made sure every table has a key.
Found it! The field was specified as a Primary Key, but its 'Identity' property was set to 'no'. Changing that fixed the problem...Thanks again, all!
I am using MS Access 2003 under Windows 7 (64bit), with external linked table at MySQL server (5.0.51a-24+lenny5), connected via MySQL ODBC connector (using 5.1.10, because the newest 5.1.11 is buggy). When I open this table in MS Access and try to delete some records from it, I get following error:
The Microsoft Jet engine stopped the process because you and another
user are attempting to change the same data at the same time.
When I try to edit some records in the table, I get following error:
This record has been changed by another user since you started editing
it. If you save the record, you will overwrite the changes the other
user made.
Copying the changes to the clipboard will let you look at the values
the other user entered, and then paste your changes back in if you
decide to make changes.
However, when I do it via deletion or update query in MS Access, it works fine! I just cannot delete the records directly from the table.
I found out (see the detailed analysis below), that the problem is present when there are double fields with values with a lot of decimal digits. See:
CREATE TABLE `_try4` (
`a` int(11) NOT NULL default '0',
`b` double default NULL,
PRIMARY KEY (`a`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_czech_ci;
insert into _try4 values (1, NULL),(2, 4.532423),(3,10),(4,0),
(5,6.34324),(6, 8.2342398423094823);
The problem is only present when you try to delete/edit the last record (a = 6), otherwise it is OK!
The issue is documented:
http://support.microsoft.com/kb/280730 , proposing these 3 workarounds:
Add a timestamp column to the SQL table. (JET will then use only this field to see if the record has been updated.)
Modify the data type that is in SQL Server to a non-floating point data type (for example, Decimal).
Run an Update Query to update the record. You must do this instead of relying on the recordset update.
However, these 3 workarounds are not satisfactory. Only first could be, but this workaround didn't work - as expected. It probably works only with MS SQL Server.
Are there any other solutions/workarounds for this problem?
Additional details:
The MySQL server is just for me, nobody else is accessing it.
Insertion of new records was working fine.
Primary key is well defined for this table.
Restart of MS Access didn't help.
Deleting the link to the ODBC table and linking it again didn't help either.
Linking the table from brand new Access database didn't help.
Changing the MySQL database engine from MyISAM to InnoDB didn't help either.
There is no problem with permissions, there are all permission for this user#host.
I can normally delete the records from the MySQL console at the server without problem.
Trying to set MySQL Connector ODBC options didn't help: Allow big results, Enable automatic reconnect, Allow multiple statements, Enable dynamic cursors, Force use of forward-only cursors, Don't cache results of forward-only cursors.
I turned on debugging in MySQL ODBC connector, it created myodbc.sql log, but it didn't contain any corresponding queries when editing/deleting (don't know why).
More details about the structure of the linked table would be helpful, but I'll hazard a guess.
I've had a similar problem in both MS Access 2003 and 2010 when I included nullable boolean fields in the SQL Server linked table. Seems JET databases have a problem with nullable nit fields. Check out this answer for more information: https://stackoverflow.com/a/4765810/1428147
I fixed my problem by making boolean fields non-nullable and setting a default value. If your problem is the same as mine, but with MySQL, try doing the same.
I solved here the same issue. The solution was to remove Default Values from decimal fields in the table. I was able to keep decimal data type but just remove the default value I already defined before with 0.0000 and now I set to null and bug fixed.
My workaround was to copy the table data into excel, then use phpadmin to clear the table, then do the editing in excel and copy the 'new' data (ie, all of it, after editing) back to access.
I have a mySQL database that tracks our projects and drives our website's display of their info. For ease of updating the database I have set up an access database that used an ODBC connection (MySQL ODBC 5.1) to edit the data. It has been working just fine for the past few months with no hiccups.
However, last night users(2 of 3) experienced Write Conflict errors. The users could only Copy the changes to the Clipboard or Drop the changes. So thinking there is something wrong with the Access database I created a new access database, linked the tables through the ODBC connection, and still the issue occurred. I also deleted and recreated the ODBC connection, to no effect.
So where do I go from here? What could have caused this issue to crop up now, not when I was setting this up months ago?
There have been no changes to the database server, database or access database in the last week (+5 days).
We have made sure that only one instance of Access is attempting to effect the database.
All tables have a PK and a timestamp column.
We are not using any forms, just using the Table interface.
The server has not been updated, nor has the ODBC connection.
We are using Access 2007
Nothing is showing up in the server's error log when we try and update rows.
In general, all ODBC databases used from Access need to have PKs in all tables and timestamp fields in them that are updated each time the record is changed. Access uses this in bound forms for handling refreshes of the bound data and Jet uses them in in choosing how to tell the ODBC database what do update.
You may be able to get things to work with some tables without PK and timestamp, but I've found that it's best just to make sure that all your tables have them so you don't run into the problem (I never have any tables with no PK, of course).y
Make sure BIT columns have default values that are not NULL. Any records which have a BIT column set to NULL could get the Write Conflict error.