How To Fix SO658 - Number <&> is incorrect

SAP Error Message - Details

• Message type: E = Error

• Message class: SO - SAPoffice: message texts

• Message number: 658

• Message text: Number <&> is incorrect

What causes this issue?

A number was entered which is not correct.

System Response

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

How to fix this error?

Check your entry. The number can have a maximum of 30 characters. The
separators hyphen (-), slash (/), and period (.) are allowed. Make sure
that you enter the complete number. The zero of the area code must
always be included.

Error message extract from SAP system. Copyright SAP SE.