I get this error code which clears and navigation continues correctly
Can you explain exactly what may be wrong. The documentation gives this explanation:05-02 Text row is too short/malformed. Check source file.

But when I look at the text file I can't see what may be wrong especially as I have copied the format of the sample files.
This is an example of my test line:-
1 N 51*03.1 W 000*37.3 ;MID
2 N 50*42.1 W 000*15.1 ;BOGNA
3 N 50*27.1 E 000*00.4 ;BENBO
4 N 50*22.3 E 000*05.3 ;HAWKE
5 N 50*12.2 E 000*15.5 ;XAMAB
6 N 49*51.2 E 000*37.1 ;VEULE
7 N 49*24.3 E 001*10.5 ;INPAX
8 N 48*34.1 E 002*11.3 ;RESMI
9 N 48*16.5 E 002*37.3 ;ODEBU
many thanks
vololiberista

Thanks for that. I have copied your format exactly and made wpt1 to EGLL. However the same error code comes up. It's the same story for the DME file with the same error msg. In practice The error msg is cancelled and navigation appears to be unaffected. But, I would prefer not to have the error msg!!!
vololiberista