There Was a Problem Sending the Command to the Program
Issue
When using one of our plugins, you received the following error: There was a problem sending the command to the program.
Cause
An issue with your AutoCAD or F/X CAD installation is interfering with the plugin's ability to function correctly.
Solution
1. Right-click on your AutoCAD or F/X CAD shortcut, and select Properties from the menu that opens.
![Right-click on your AutoCAD or F/X CAD shortcut and select Properties](/images/docs/kb/autocad-issues/errors/3991/rightclick.png)
![Properties dialog box](/images/docs/kb/autocad-issues/errors/3991/admin.png)
2. The Properties dialog box will open.
Select the Compatibility tab, and check the box to Run this program as an administrator.
Click OK.
3. Double-click on a drawing to open it. You'll see an elevated prompt. Click Yes.
4. Close AutoCAD.
5. Right-click on your AutoCAD shortcut again, and select Properties from the menu.
![Select Properties from the menu](/images/docs/kb/autocad-issues/errors/3991/rightclick.png)
![Properties dialog box](/images/docs/kb/autocad-issues/errors/3991/admin-2.png)
6. In the Properties dialog box, uncheck the option to Run this program as an administrator.
You should now be able to use the software without generating the error.