How to set the Access Rights for OPC XML-DA Wrapper

If a XML-DA client is having problems with accessing the SAEAUT SNMP OPC Server, then the COM security of your computer might be required to be modified. To do it, please follow the steps below:

Click on start à Control Panel à Administrative Tools à Component Services à Computers à My Computer.

Right-click on the My Computer item and select the Properties item.

Figure A: Component Services, My Computer Properties

3. Click the tab COM Security and click Edit Default button under Access Permissions group.

Figure B: My Computer Properties

4. You need to set the Local Access and Remote Access for the ASP.NET user.

Figure C: Access Permission

If ASP.NET user is not in the user list, click the Add button and make sure that the location where you search for users is the name of your computer (Locations à "PC NAME").

Figure D: My Computer Properties

Figure E: Locations

Then click Advanced à Find Now, choose ASPNET user and add it to the user list.

Figure F: Select Users or Groups

OK. The settings for Access Permissions are setted. Now, go back to Step 3 and adjust the same settings under Launch and Activation Permissions group. Then restart your computer.

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