Input must be in the format &

What causes this issue?

Your entry does not match the specified template.

System Response

The entry in this field was rejected.

How to fix this error?

The entry must comply with the template format. The following template
characters have a special meaning:

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

<zh>_ (underscore) </> There should be an input character at this point.
This should be a digit for numeric fields.
<zh>, (decimal comma or point):</> is valid for numeric fields and
timestamps of type UTCLONG. A decimal point or comma is placed here.
(Setting is made in user master record).
<zh> . (thousands separator):</> is valid for numeric fields. The
separator appears between every three digits (optional). Depending on
the setting in the user master record, it can be a period or a comma.
<zh>V:</> is valid for numeric fields: the plus/minus sign is placed
here. If one is used, it must be placed on the right edge of the field.
The sign is '-' or ' '(blank character).
<zh>~ (tilde):</> is valid for numeric fields. Leading zeros must also
be specified from this point to the right (inclusive). Otherwise, this
character has the same meaning as the underscore. Leading zeros do not
need to be specifiied to the left of the tilde. Neither are they di
splayed in this position.
All other characters stand for themselves. When they are input, they
must be in the same position as in the template.

Error message extract from SAP system. Copyright SAP SE.