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Message type: E = Error
Message class: VL -
Message number: 156
Message text: Material & is blocked (delivery quantity will be set to '0')
This material is blocked by another user or application.
The system cannot carry out the requested activity at this time.
Try again later. Check the entries in lock management to determine the
cause for the block, if necessary.
Error message extract from SAP system. Copyright SAP SE.
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VL155 Material & is blocked
What causes this issue? This material is blocked by another user or application...
VL154 Delivery is being processed by WM
Self-Explanatory Message Since SAP believes that this specific error message is ...
VL157 Error when locking
What causes this issue? During the preparation of available requirements per pl...
VL158 Delivery does not allow the required change
What causes this issue? As the quantity of the inbound delivery was being check...
SAP messages fall into 3 different categories: Error messages
(message type = E), Warnings (W) or Informational (I) messages.
An error message will prevent you from continuing your work - it is a hard stop and you need to fix the error before you can proceed. A warning message will stop your work, however, you can then bypass the warning by pressing the Enter key on your keyboard. That said, it is still good practice to investigate the cause of the warning message and address it. An information message will not stop your work and is truly just for informational purposes.
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