I have a timebased workflow with field update action. Based on field update a trigger will clone the opportunity with new contract dates. Its like renewal of opportunity based on tenure of months.

But the field update action is failing in few occasions. I had enabled "Re-evaluate rule..." option too. But still the action fails. Can anyone please suggest any option to identify the root cause for this?

We have a customised product builder app and we are trying multiple delete functionality.
When saved records are deleted, its getting deleted normally.
When temporary records are deleted we are getting value not valid error.

Please help me resolve this issue