Error message on same screen using TMG event

Dear All,

I am stuck due to a very small issue in TMG events.

Using TMG event 01, I need to do some validation and display some error messages.

But these error messages are coming on to the next screen and if I press 'Enter', it navigates back to same screen with data.

Requirement is:

1. Error message on the same screen
2. Disable all fields except the field which has error

Following is the screenshot of the error message on next screen:

Looking for a solution. Kindly help.

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Regards

Deepak Batra