CONVERSION_CODEPAGE_UNKNOWN is an ABAP runtime error which you may come across when using or developing within an SAP system. See below for the standard details explaining what it means and how you can avoid or fix this runtime error.
Short Dump Classification: A - ABAP Programming Error
You can view further information about a runtme error by using transaction code ST22 which will show you this and all runtime erros that have happen in your SAP system.
Also check out the Comments section below to view or add related contributions and example screen shots.
You can avoid this error by using a conversion table known to the
system. You can use transaction SPAD to view a list of implemented
conversion tables.
If you have added the conversion table, use Transaction SP12 to
invalidate the code page buffer (CCC).
Please see search hints for more details about the possible cause of this runtime error and how it could be avoided.
Please see send to sap for more details about the possible cause of this runtime error and how it could be avoided.
Internal return code = '<runtime parameter>'
Unable to convert from code page '<runtime parameter>' to code page '<runtime parameter>'.
Please see abap error for more details about the possible cause of this runtime error and how it could be avoided.
One of the conversion tables you have chosen (CODE PAGE) '<runtime parameter>' or '<runtime parameter>'
is not known to the system.
You can find a list of known conversion tables in table TCP00. You can
display this in transaction SPAD.
Please see abap error for more details about the possible cause of this runtime error and how it could be avoided.