I've donwloaded the following maps:
andorra-latest.osm.pbf https://download.geofabrik.de/europe/andorra-latest.osm.pbf
azores-latest.osm.pbf https://download.geofabrik.de/europe/azores-latest.osm.pbf
cyprus-latest.osm.pbf https://download.geofabrik.de/europe/cyprus-latest.osm.pbf
And I am using osmconvert to merge maps. I read this answer to merge maps. So my command of merging the above maps looks like this:
.\osmconvert andorra-latest.osm.pbf --out-o5m | .\osmconvert - azores-latest.osm.pbf | .\osmconvert - cyprus-latest.osm.pbf -o=all.osm.pbf
However, the osmconvert shows the following errors after running the above command:
osmconvert Error: unknown file format: standard input
osmconvert Error: could not open input file: .osm.pbf
However, the merging perfectly works in Windows 7 and Windows Server 2016 Standard
Does anybody know how to solve this error?