Mihai Badita July 26, 2016 16:55
This is a known issue regarding using Microsoft OCR in a loop which is causing random crashes in some conditions.
In the meantime, the workaround is to extract the bit that is scraping in a separate workflow and use Invoke Workflow with Isolated option. This will execute the critical part in a different process and, when the crash happens, it will actually close just that process, returning an error in the caller workflow.
The next UiPath version will provide an improved architecture for OCR operations - they will run out of process. Till then please use the workaround.