Maybe some DLLs are not installed on that machine?
Maybe if you run Dependency Walker on that machine you will see what.

>Dear All
>
>I got strange problem with XFRX.
>I changed format of the bitmaps to PNG. Tested on my machine, ad it is working fine. Deployed exe
>to the network and it is working on all machines - except for one Win XP / SP3, where it crushes with folowing messages;
>
>

>Library file  ..\xfrx\xfrxlib.fll is invalid
>

>
>On pressing ignore, I get next message
>
>

>File _xfconvertimage.prg does not exist 
>

>
>
>After that, I still get my PDF but without PNG picture. Space is left blank.
>
>Report is not FRX based, it is direct XFRX scripting.
>
>
>What could be the problem ?!?
>
>Any help is greatly appreciated.
>
>TIA
>Sergio