try to create file in location

Please help me with command fix,

I am trying to create a file after cycle completing in location.

Below is the command using in the script :

print('Attempting to create [$GV_OUTBOUND_DIR][$GV_FILE_NAME]');

print(exec('/bin/sh','-c "touch [$GV_OUTBOUND_DIR]/[$GV_FILE_NAME]"',8));

Variables :

$GV_OUTBOUND_DIR] - added path O:\Project\++Projects\Cube\ETL_Unit_test

[$GV_FILE_NAME] - File name with extension, eg: FILEGEN.txt

Error Message: