Charracter limit un Validation Script and WkAc_EmailTo in WorkflowActions

Hello,


I can see that in the workflow, into a rule, i want to use a validation script, but it has a limit in the number of characters ,...

I finded the field where the validate script is saved in the databasen and the field is WkAc_EmailTo in WorkflowActions Table, ... i don't understant why, some error in the version?

CRM 7.2c