953-Error Communicating with Server

A 953 Error (often appearing as 953 - Error Communicating with Server) typically indicates a breakdown in communication between the GibbsCAM client and the NLO (Network Licensing Option) server. This usually occurs because the client cannot find the server on the network or the specific port is being blocked.

Below is a troubleshooting guide to resolve this, categorized by Server-side and Client-side checks.

1. Server-Side Verification

Before troubleshooting the user's computer, ensure the license server itself is healthy.

Check the License Service: Open GibbsRLMServer service (or the CimLmService for GC14 - GC 2023). 

Ensure the service is "Running." If it is stopped, click Start.

Verify the Port:

GibbsCAM Reprise (RLM): Uses port 2764 for the Host line and port 2765 for the ISV line.

CimLmService: Uses port 10106..

Ensure this port is open in the Windows Firewall for both Inbound and Outbound rules.

Ping Test: From the server, ensure you can ping your own hostname to confirm network stack stability.

Below are steps to resolve the roaming issue.

1) On the client delete the roaming XML from:

GC2025: C:\ProgramData\CAMBRIO\GibbsCAM\LicenseData\250.0

GC2026: C:\ProgramData\Gibbs\GibbsCAM\LicenseData\260.0

2) On the client there could be roaming license files in the C:\ProgramData\Reprise. Delete all files except the rlminfo.5053
3) On the client, make sure the NLO start up file is set to 0. Located C:\ProgramData\CAMBRIO\GibbsCAM\25.0.41
4) On the server delete all files expect the rlm.info.5053 and the rlmlock file. C:\ProgramData\Reprise
5) On the server reset the services and the stuck roaming license should be released.

If necessary, adjust the HOST name in the license file:

To adjust the HOST name in the license file, use Notepad to open the client's *.lic file and make sure the HOST name is correct, using one of the following examples.

​

Example 1: If the license file references the server by hostname (such as "myServer"):

#LSHOST=myServer

HOST myServer

Example 2: If the license file references the server by IP address (such as "10.101.102.103"):

#LSHOST=10.101.102.103

HOST 10.101.102.103

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