You might want to use the API as referenced by Tony later in the thread as that would be a better way to handle this.
Either way you would loop through the records for the load and compare the account to either that recordset I return OR (recommended) you would take the current row's account and use the API to check it.
I'm trying to follow this thread but need some guidance. I couldn't figure out how to use the fisaccounticp command, and actually I don't need it. All of our IC accounts are 8 characters. Anything account with less is not ICP. Can someone help with the following script and explain a little how and when the script executes? Sorry if this is a loaded question. I'm new to the event scripts.