Enter the start or availability date/time

What causes this issue?

You want to create an order but have not specified a start date/time or
an availability date/time.

System Response

The system cannot create the order.

How to fix this error?

Enter a <ZH>start date/time</> if you have defined one of the following
planning directions in the strategy settings:
<LS>Forward</>
<LS>Forward with reverse</>
<LS>Backward with reverse</>
Enter an <ZH>availability date/time</> if you have defined one of the
following planning directions in the strategy settings:
<LS>Forward with reverse</>
<LS>Backward</>
<LS>Backward with reverse</>

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.