: For standalone licenses, deactivating and then reactivating the license can fix corrupted license files. Check Port Access : Ensure ports 80 and 443
Use the WlmAdmin.exe utility (typically found in C:\Program Files (x86)\Computers and Structures\Sentinel RMS... ) to check the expiration date of the license. If it is past its date, you must contact your administrator to renew it. 5. Add an LMHOST.INI File
ETABS License Error #18 (SentinelLM Error #18) typically indicates that the software cannot recognize or validate the license, often caused by selecting the wrong license type during installation or a mismatch in server communication Draft Report: Resolution of ETABS License Error #18 1. Immediate Root Cause Analysis Installation Type Mismatch : This error frequently occurs if "Use Network License" etabs license error 18 2021
A: Yes. Major Windows updates can reset security settings, block licensing components, or change hardware identifiers that licenses are locked to.
. This often occurs because the program is incorrectly searching for a network license instead of a standalone one, or because the license file is missing from the server. Common Fixes for Error 18 Switch License Type : During installation, ensure you select "Use Standard License" If it is past its date, you must
Compare the machine's current locking code to the one provided in your official license documentation. If they don't match, you must request a new license key from CSI Support . :
files and delete them if present, then restart the software. CSI Knowledge Base Additional Troubleshooting Steps Immediate Root Cause Analysis Installation Type Mismatch :
The error occurs because the program cannot find a valid authorization. Most users resolve this by or ensuring their system clock is correctly synchronized. To help you more specifically, could you tell me: Are you using a Standalone (USB/Web) or Network license?
For further help, visit the (Article ID: KB-0018-2021) or contact your local software distributor with the error log found in %TEMP%\CSiLicense.log .
: If the error occurs randomly, try closing ETABS through the Task Manager
This article provides a detailed, actionable guide to understanding and resolving the ETABS License Error 18 in the 2021 software environment. Drawing from official CSI documentation, user community experiences, and technical best practices, this comprehensive resource covers everything from root cause analysis to step-by-step solutions and long-term prevention strategies.
