On the left-hand side you will find a button with an arrow. If you click on the button, the
validation rules are displayed. This allows you to display descriptions of the individual rule requirements. Validation rules test, for example, whether calculations within the message are displayed correctly or whether sequence numbers - such as for items in a message - ascend without gaps. If a rule is incorrect, you can also see which information from the message was used in the rule. If the message contains incorrect rules, a red dot with the number of incorrect rules is attached to the arrow for expanding the rules.
You can use this information to correct the message bit by bit. We recommend that you first correct the structural errors. For example, add missing mandatory information. You should then correct logic errors by reading through one check rule after the other and changing the message according to the specifications. Correcting incorrect master data is then the last step.