save2gdf -z -f=HL7 source dest.hl7
dest.hl7.gz does not contain the sample values but only the empty fields <digits></digits>.
Writing the file without -z option and then compressing with gzip works fine.
save2gdf -f=HL7 source dest.hl7
I've tested the local extensions of tinyxml in XMLParser, and I do not see any missing issue. All Print() functions have been duplicated as gzPrint().