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The url to open a drawing depends on which port and path you selected during server install:
http://localhost:{http-port}{deploy-path}?fileUrl=…
e.g. for port 80 and deploy path /
Linux: http://localhost/?fileUrl=file:///home/andrea/Documents/My%20Drawings/test.dwg
Windows: http://localhost/?fileUrl=file:///c:\Users\hentschke\Documents\My%20Drawings\test.dwg
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