3270 and 5250 screen errors
Look up keyboard, input and data-stream errors on 3270 and 5250 screens.
All 28 codes
X (input inhibited)Keyboard locked, input inhibitedX PROG 750Invalid 3270 commandX PROG 751Invalid character set in an orderX PROG 752Invalid buffer addressX PROG 753Invalid data or parameter valueX PROG 754Order without its parametersX PROG 756Invalid structured fieldX PROG 758Invalid mode in Set Reply ModeX PROG 759Invalid structured field lengthX PROG 761Invalid partition IDX clockHost or terminal busy, waitX COMMCommunication checkX -fFunction not availableX SYSTEMKeyboard locked by the host5250 error 0004Typing not allowed in this field5250 error 0005Cursor in protected area of display5250 error 0007Mandatory enter field, data required5250 error 0008Field requires alphabetic characters5250 error 0009Field requires numeric characters5250 error 0010Only characters 0 through 9 allowed5250 error 0014Mandatory fill field, must fill to exit5250 error 0015Check digit error5250 error 0016Field Minus key not valid in this field5250 error 0018Key used to exit field not valid5250 error 0019Dup or Field Mark key not allowed in field5250 error 0020Enter key not allowed in field5250 error 0024Decimal field, entry not valid5250 error 0099Key or function not valid now
No matching codes
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Working with 3270 & 5250 errors
Start with the exact status-area message. Input inhibition, keyboard state and a rejected host data stream are different problems. Record the session type and the action immediately before the error; do not reset away the evidence before capturing it.
Browse all 494 error codes · WND Terminal’s offline code hints
Use WND Terminal with your host system
WND Software develops WND Terminal Emulator for mainframe, IBM i and UNIX access. For connection and keyboard features, see the 3270 terminal emulator or 5250 emulator for IBM i. Explain this screen provides screen-specific assistance using the model endpoint and context permitted by IT; the reference article explains the code independently.