When I try to configure the string manipulation node to trim my variable NIS code by using the command substr(…,…,…), I get the following error message:
Could someone explain to me how to solve this? When I first configured this node and executed it, there were no errors. When loading this workflow again, I got this error.
Could you provide the String you are using in your variable? Or give an example workflow?
Just with the error message I cannot actually see what is wrong