On a document library I have a workflow that will update the item for the column Volgnummer (index number) with the item id that is being looked up in the list. That's it, there is only one action.
The item is a document in a library. The column Volgnummer is of the type: number.
The item is always updated but I do receive the following errors and therefor the workflow is unfinished:
1. The workflow could not update the item, possibly because one or more columns for the item require a different type of information. Unknown error.
2. The workflow Update volgnummer errorred.
What might cause these errors and how can I prevent/fix it?