First check the action that corresponds to the error id, if everything is ok with it then check the if conditions that are above this action and most likely there is a syntax error there. There is an old bug in bas when the id indicates an incorrect error number
Thank you! it worked, i was using [[VARIABLE]]/Images.txt with expression, it was also giving me error but then i used it with string then it worked. I thought in string, variables values cannot be used :)
