Undocumented error (errornumber 52)

Hello,

I am making a SOAP call to InDesign Server. The return message states that an error occurred. It only gives me a number (52). There is no further explanation in the message. This error is also not listed in the errors documentation (SDK -> doc/references).

Does anyone have an idea as to what this error code might mean or where I can find more information about it?

Thanks,

Karel van Dijk.