Hi Jan,
I just stumbled across this:
Welcome to SWI-Prolog (Multi-threaded, 32 bits, Version 5.9.7)
1 ?- consult('//ad001.siemens.net/dfs001/File/DE/bwga024a_ts_ra_rd_wst/WST3/pdelta.pro').
% //ad001.siemens.net/dfs001/File/DE/bwga024a_ts_ra_rd_wst/WST3/pdelta.pro compiled 0.02 sec, 66,496 bytes
true.
but
Welcome to SWI-Prolog (threaded, 32 bits, version 9.0.4)
?- consult('//ad001.siemens.net/dfs001/File/DE/bwga024a_ts_ra_rd_wst/WST3/pdelta.pro').
ERROR: source_sink `'//ad001.siemens.net/dfs001/File/DE/bwga024a_ts_ra_rd_wst/WST3/pdelta.pro'' does not exist
Cheers!
Holger