In Marg ERP Software, if "You are not authorised to use this option" alert appears at the time of Opening Purchase Return Book, then this issue can be resolved.

In order to resolve this error, the user needs to follow the below mentioned steps:

• Go to Masters > Passwords & Powers > Operator's.

• The user will select the operator to make desired changes.
• Suppose select '02' and press 'Enter' key.

• The user will click on ‘Search In All’ option.

• The user will search 'Sale Manager' and click on ‘Accept’ button.

• In 'Purchase/Sale/Reports Manager' option, the user will select 'Y'.

• Press 'Esc' key.

• Click on 'Yes' button.

• A 'Powers Change' POP-UP will appear, in which the user will press 'ESC' key.

• Click on 'Yes' button.

• Now, for Re login the user will press 'Ctrl+U' key on the main screen. 

• Enter the User ID and Password.

• Press 'Esc' key.

After following the above steps, the user can view the "You are not authorised to use this option" alert in Purchase Return Book will be resolved in Marg ERP Software.