Check in eCATT if a screen exists

Hello,

I have a question about checking an optional screen element. There is a CHEGUI and I check a field in there. But it is possible that the screen, that is checked by the CHEGUI, doesn't occure. Is there a possibility to check if the screen is there (and do the CHEGUI) or if it is not there to skip the CHEGUI?

In other test automation frameworks like QTP are mehtods (EXISTS() )for such an operation but in eCATT I didn't find something until now.

regards,

Wolfgang