Troubleshooting

Problem: When you try to solve from local to remote machine, a SIMPLORERLCOMENGINE process starts on the remote machine, but the Twin Builder user interface freezes.

This occurs when you enable the remote solve option after starting the COM daemon, or when you select Don't allow exceptions for the Windows firewall.

Resolution: Remote solve needs either firewall exceptions to be ON or firewall to be completely turned off.

Problem: When you try to solve from a local to a remote machine, you receive the following error message:

[error] Unable to locate or start COM engine on 'nomachine' : Unable to reach AnsoftRSMService. Check if the service is running and if the firewall allows communication. (10:57:13 PM Aug 13, 2019)

Resolution: This message can happen if the machine is not present, the network connection is down, if there are firewall issues or if the service is not running.

Remote Solve Node = Windows

Error: "Unable to locate or start COM engine on <remote node> : Unable to reach AnsoftRSMService. Check if the service is running and if the firewall allows communication."

  1. Disable the firewall.
  2. Confirm that you have not changed the Ansoft Service Port in Tools > Options > General Options > Remote Analysis Options from the default 32958. If you have, change it back to 32958, restart Twin Builder, and try to solve again.
  3. Make sure that the local machine can contact the RSM port on the remote node. Open a command prompt on the local machine and type telnet <remote node name> 32958. If the terminal appears to be hanging, then the connection was successful.
  4. Check to make sure the Ansoft Communication Service is running. To do this, go to the Windows Control Panel and choose Administrative Tools > Services. Find the RSM service and make sure its status is Started. If it is not running, try to start it; right-click the service and choose Start. If it still does not start, check the user name/password combination listed in the Log On tab of the service properties.
  5. Make sure the user listed in the service is an administrator.
  6. Make sure the COM engine is registered with the RSM service. From the Windows menu, choose Start > All Programs > Ansys EM Suite 2025 R1 > Register with RSM to register the engines.

Error: "Unable to locate or start COM engine on <remote node>: Engine is not registered with the RSM service which is running on this machine."