An internal error occured while calling saveDocumentToCorporateMDP' API

i am getting saveDocumentToCorporateMDP API error while try to save a new document.

1.)i cleared browser cache.

2.)i uninstalled lastest Java versions and our BO Server installed default version.

3.)i purge the data before saving.

but still i am facing the problem.

Note: This is intermittent and some times in a day working fine.

but every time i have to re-work and consuming lot of my business time.

any help would be greatly invited.

Thanks.