Hello Detlef
You can also check your file version and patch level using the following
method:
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Please press "ALT+F12" on the keyborad in any session in SAP system,
select "About"(last option), and check what's the "File Version" and
"Patch Level" on your PC?
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If it's already patch level 1, you don't need to apply it once again.
Sometimes, a GUI installer will contain a patch. e.g. GUI 730 CD 3 may
contains GUI 730 patch 7, in this case you can only apply GUI 730 patch 8
or higher patch level on the PC.
Best Regards,
Liang