Associated Drawing gone missing

We work on a network and sometimes we see where you pull up a part or assembly and then try to open the associated drawing which resides with the part or assembly and Solidworks acts as if there is no drawing at all and prompts for a template/new drawing..  If you do file open you can see it sitting there.  We work on a network directory is this a network that is too slow for Solidworks or something else?  Anyone seen this?

SolidworksDrawings And Detailing