Computer can see files but wont play them on net work share

Right – and in the meantime you can fix any “bad” ones by simply running them through MKVMerge 4.0 or earlier (there are links to this version on the forum).  It takes only a few seconds and is painless .

(You can also fix it with a later version of MKVMerge, but then you have to go into each track and turn off header compression, so it’s safer and easier to do it with an earlier version).