rfc/cp_convert/ignore_error is a SAP Parameter attribute which is used to control default whether rfc character conversion errors are ignored information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
0 =>
if character conversion errors occur, a rabax is generated
1 =>
character conversion errors are ignored and unknown charcters are
replaced by the charcter value that is specified in profile parameter
rfc/cp_convert/conversion_char
See SAP Parameter Documentation for full SAP documentation for this profile parameter.