TCL script not working anymore - tcl

Question

I used to run a tcl script for the Cadence tools on a server, however, now the script fails to run.
The script is based on the following one:
#### Template Script for RTL->Gate-Level Flow
#### all basic steps except for DFT-scan
#### Fill in the <...> fields for your module
#### and update library search paths for your system
if {[file exists /proc/cpuinfo]} {
sh grep "model name" /proc/cpuinfo
sh grep "cpu MHz" /proc/cpuinfo
}
#### Set up
set DESIGN test
set SYN_EFF medium
set MAP_EFF medium
set DATE test
set global_map_report 1
set map_fancy_names 1
set iopt_stats 1
set SYN_PATH "."
set _OUTPUTS_PATH outputs_${DATE}
set _LOG_PATH logs_${DATE}
set _REPORTS_PATH reports_${DATE}
set_attribute lib_search_path {. ./lib} /
set_attribute hdl_search_path {. ./rtl} /
set_attribute information_level 7 /
set_attribute map_timing true /
set_attribute retime_reg_naming_suffix __retimed_reg /
set_attribute library lib
... continues
First I open a csh in order to run a csh script to setup the Cadence tools on the server, then I run source script.tcl. This used to work, however, now it fails with the following error:
Missing ].
And if I comment the first if:
set: Syntax Error.
What may have changed in the server for this to happen and how can I fix this? The script did not change, so its syntax is correct.

Answer 1

As your comments in code described, you should call source script.tcl inside the tool, not in csh which doesn't understand Tcl syntax, nor in tclsh which doesn't understand those Cadence-specific Tcl commands.
Also, the two line
sh grep "model name" /proc/cpuinfo
sh grep "cpu MHz" /proc/cpuinfo
should be
exec grep "model name" /proc/cpuinfo
exec grep "cpu MHz" /proc/cpuinfo
since exec is the correct Tcl command for calling shell commands.