We have implemented Rule based workflow, and also implemented the USMD_RULE_SERVICE BAdi to do some custom validations, all these validations are triggered only during the Processing step 00, but not during the rest of the steps in the Workflow approval.
Even the standard message for the mandatory checks in the entities were not shown. Have checked all the configurations for the CR steps validations are made as standard for all the steps.
Please suggest is there any other configuration required to get the validations triggered.
PFA screen shot for the missing validation which is working fine in processing '00' steps but not is others.