Type conflict when calling a function module

Hi,

When I try to update values in a table I get the following error:

<b>Type conflict when calling a function module., error key: RFC_ERROR_SYSTEM_FAILURE</b>

The first row in the Table gets updated, but the following rows do not get updated.

I do not quite understand the error. If anyone has seen the same and could shed some light on this, would be greatly appreciated.

NAC