SharePoint 2010 Designer workflow failing in an Ad hoc manner.

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InfoPath

SharePoint2010

workflow

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Hi Friends,

We have a SharePoint 2010 Designer workflow with 25 approval stages (supposed to run for around 1.5 yrs. ) . We have a consistent problem in the workflow as it keeps failing with message "error occured" at some stages(not uniform) after a users tries to submit his Tasks .

After lot of troubleshooting , we found that all the workflow which is getting failed have a Tasks on which the due date of tasks has exceeded. I meant to say that user is submitting his Task (which is a custom info-path 2010 form ) after the due date of the Tasks.

Can any one suggest if this is supposed to be the Obvious behavior of workflow ? That is ,if the user submits his Task when the due date has passed , the workflow will fail with error.

Athar raza faridi