How to Fix <MOD-DIAM> in SOLIDWORKS Dimensions

What are the Recommended SOLIDWORKS Settings?

That’s a tricky question! As SOLIDWORKS settings are completely customisable, you have the freedom to set yours up however you feel is comfortable.

For new users, however, we recommend watching this video to find out what the best SOLIDWORKS settings are for getting started.

Mod-diam in place of diameter

Why does the Diameter Symbol Stop Displaying in SOLIDWORKS?

Sometimes after performing an upgrade of SOLIDWORKS, diameter symbols no longer display properly and give a message instead. You may also notice this issue after Windows has installed updates.

Either way, you’re seeing in place of diameter symbols in drawings, parts or assemblies. Here’s a simple, step-by-step guide to fix errors.

How to Change the SOLIDWORKS Symbol Library File Path

Step 1: Navigate to System Options

Within SOLIDWORKS, go to the Options cog and open the System Options.

Step 2: Select System Library File

Select File Locations and in the drop-down menu choose Symbol Library File.

System options

Step 3: Delete Symbol Folder

Select the currently visible directory and delete it. Don’t worry, we’ll replace it in the next step.

Delete the directory

Step 4: Add Symbol Library File

Click Add and navigate to the location of your Symbol Library file. By default this is:

C:\ProgramData\SOLIDWORKS\SOLIDWORKS 20XX\lang\english

Navigate to the symbol library file

NB: ProgramData is a hidden folder. If you do not see it in your list of folders on your C: drive, head to Windows Explorer > View and select the Hidden Items checkbox.

Hidden items

Select OK and accept any Windows Firewall messages.

Done!

Select OK and accept any Windows Firewall messages. SOLIDWORKS dimensions should now display the diameter symbol.