SAP Message TK430 - Client &1 has status 'not modifiable'

TK430 : Client &1 has status 'not modifiable'

163897changing PD objects in an unmodifiable client
203443Message TK430 when calling up Transaction OVBO
557503OB58: Current settings in test system
200674Fin.statement vrsn: Maintenance in productn clients
168718FI-LC: master data cannot be changed