DRaft Sight DWG files opening as Read only file

we have installed DRaft SIght in Ubuntu 16.04 LTS and 18.04 LTS .

A share files in server . When we open draft sight (.DWG) File from server , it showing read only .

Where as in Ubuntu 14.04 LTs is working fine and good .

Since we have tried permission and other things . Any way to open DWG files without Read only and make it working while saving in same File name

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