web_custom_request error on replay

Hi,

We have recorded a a script in the Web (HTTP/HTML) mode, which generates a Custom Request. This has never been an issue before but on replay for this script we get an HTTP 500 error. On closer investigation we are seeing an error in the vugen log saying 'too much data for base 64 to encode'.

There is a lot of data in the body of the request. Is there a limit on the amount of data which can be encoded? or is this a symptom of another issue?

Thanks,

Justin