I use Node JS & Puppeteer to perform an automated task, my script works well but from a hundred loops, the script stops, or encounters an error
I would like to restart the loop in this case, thank you
Related
pause should stop the execution until something happens. But in my case where i have OCTAVE 5.1.0 on OS WINDOWS 10 is not doing its work properly. It does ignore all pause statements in script and execute the whole file.
I am running this program in my installed octave application in command window with GUI.
What may be the problem?
I have tried pause with function brackets
pause();and without function brackets pause; but still problem remains same.
%do something
plotData(X, y);
fprintf('Press enter to continue.');
pause;
%do something
plotData(X, y);
I except that script will first plot data and will stop execution till key is pressed to enable me to analyze data then after key press it would plot another plot with processed data.
But it just plot both plots in fast manner that i could not see it.
There are few bugs related to pause that have been introduced since version 5.1 and seem that recently have been fixed. It will be available in the next version. You can try alternative functions like kbhit or switch to a previous version.
I am using CreateProcess and giving Chrome.exe as the argument.
I am getting the handle of the process I created using PROCESS_INFORMATION which internally has hProcess
When I print the PID using GetProcessId(handle) I am getting a different PID than the ones showing in the task manager.
I have tried setting callback function to trigger after Chrome.exe exists, but it triggers anyway. This is expected (not desired) since Chrome.exe PID is different.
It seems like when I use CreateProcess on Chrome.exe, chrome takes liberty to start its own new process and render all my control useless.
I have tried using it with FireFox.exe and it worked well, I got the handle it pointed to the correct process.
Is it not possible to get handles to Chrome processes I spawn?
The Chrome process you are spawning with CreateProcess() is, in turn, spawning its own child process(es) and then terminating itself. Your Firefox is not doing that, at least not initially (Firefox does use child processes for browser tabs - most modern browsers do, for security and stability).
So, the Chrome PID/handle you get from CreateProcess(), albeit valid, is short-lived and clearly useless for your needs.
But, all is not lost. You can get notified about the child PID(s) that Chrome itself spawns. Add your spawned Chrome process to a job object, then use SetInformationJobObject() to assign that job to an I/O completion port, then use GetQueuedCompletionStatus() to receive events from the job, in particular JOB_OBJECT_MSG_NEW_PROCESS whenever a new process is created in the job, and JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO when all processes in the job have ended. See How do I wait until all processes in a job have exited? for more details.
I'm probably missing something obvious here but maybe you can help me.
I have a tcl script. Here it is in its entirety:
puts [encodeSDR 25]
proc encodeSDR {input} {
set sdr "test"
return $sdr
}
when I run this script I get an error:
c:\temp>tclsh testenviro.tcl
invalid command name "encodeSDR"
while executing
"encodeSDR"
invoke from within
"puts [encodeSDR 25]"
(file "testenviro.tcl" line 1)
What am I missing? Seems like this should work perfectly.
PS. Found possible reason:
There when I put the puts call below the proc it worked - so does it not load the entire script first? seems weird if that's the case but maybe thats it.
You are correct in that the entire script is not loaded before any execution takes place. A TCL script is interpreted one command at a time, and then will move to the next one only once it is finished. There is no compiling beforehand to check for procedures you may be referencing down below.
In your case, it first tried to interpret the puts command, which involved calling encodeSDR. Since that had not been defined in memory as of yet, the interpreter had no idea what you were trying to do.
One thing to watch out for is if you define the procedure by itself (say during testing/debug), and then later add it into a script in a way like your example. It will work just fine until you close out of the session, and TCL's memory gets released. The next time you load the script, however, it will fail because the procedure was never loaded for that session.
I have set up a ScheduledTaskAgent with a LaunchForTest (which I know is being called). When I launch the main app, it seems to successfully add the task and OnInvoke runs to completion (calls NotifyComplete), but never seems to run again. I've pared down the OnInvoke to do nothing other than call NotifyComplete, but it still only ever runs the one time following ScheduledActionService.Add and ScheduledActionService.LaunchForTest (with a few seconds' delay).
What could be preventing it from running more than once?
I am assuming it is about PeriodicTask.
You are right. It will run only once and that is because of the LaunchForTest call, wherein you have specified the timespan. After that execution, you have to wait another 30 minutes for it to run.
Are you adding the ScheduledActionService.Add in App.xaml.cs? I mean, on the launch event? You should. If you have that, then you could run the app again, and it will invoke the task agent.
If you are hitting the breakpoint even once that means that you are correctly set up. You have to remember that ScheduledActionService.LaunchForTest is just a function that you can call under debugger. It will not work when the app is released.
Basically, there is no way to fire the background agent, you can register it and then forget it. Windows Phone OS will invoke it periodically.
If you want to debug the periodic task multiple times then you can put LaunchForTest in a loop with delay.
I want my Access application to run an external program (in this case a R script) after the user clicks a button. I use this code:
Dim RetVal
RetVal = Shell("""C:\Program Files\R\R-2.10.1\bin\R.exe"" CMD BATCH --no-environ --silent --no-restore --no-save ""c:\test.R"" ""c:\test-result.txt""", vbHide)
MsgBox RetVal
This works fine, but the VBA code keeps on running while my script is executed. How can I make Access waiting for the script to be finished? Has anybody suggestions about how to give an error message of the script back to Access?
The OpenProcess and WaitForSingleObject combo that #Remou links to, is probably your best bet for doing this. You should take a look at this, it's a nice drop in module for shell and wait.
For returning a message back from the script, you could mess around with redirecting the scripts input and output. This is not for the faint of heart. As an alternative I would redirect the output of the script to a text file, then read in that file after it exits.