When Tibco ActiveMatrix Tuxedo Adapter is configured with workstation mode throws below error message:
===== 
TuxedoAdapter.ESBTuxedoAPI-CDSTuxedoAdapterCfg Info [Adapter] AETUX-920035  Unable to open connection with Tuxedo   
TuxedoAdapter.ESBTuxedoAPI-CDSTuxedoAdapterCfg Error [Adapter] AETUX-00020 An MException Occurred. Type: AETUX-920035 Description: Code = AETUX-920035, Category = Adapter, Severity = infoRole, Description =  Unable to open connection with Tuxedo , File = /tsi/workspace/release/src/adtuxedo-6.0.0/src/adapter/src/TuxedoAdapterCore.cpp, line = 2070.
=====

The error log indicates that the connection to the Tuxedo server cannot be established. 
The adapter calls the tuxedo client using "tpinit" API to get the connection to Tuxedo server. If it not established then ActiveMatrix tuxedo adapter throws the error.

Below are the causes of the issue:
1. If the WSNADDR parameter is not properly set or is incorrect or if there are connectivity issues from the adapter's machine to the Tuxedo services machine.

2. If ubbconfig file having the incorrect setting of TUXDIR, APPDIR, TUXCONFIG, ULOGPFX, and CLOPT parameters. 
 

When Tibco ActiveMatrix Tuxedo Adapter is configured with workstation mode throws an error message "AETUX-920035 Unable to open connection with Tuxedo"

Product: TIBCO ActiveMatrix BusinessWorks Plug-in for Oracle Tuxedo Version: 6.0.0 OS: All Supported Operating Systems

To resolve this error follow below options:

- If Workstation is used to connect to tuxedo services, verify the WSNADDR address specified in adtuxedo_wrkstn.tra file and adtuxedo_wrkstn_env.sh file.
- If WSNADDR is already specified in adapter .tra file, verify the tuxedo services are running on the same i/p address and port specified in the .tra file.
- Check the network traffic between both the machines if tuxedo services and the tuxedo adapter are on different machines. also, check the firewall are closed.
-Verify the "ubbconfig" file present at Tuxedo server. This file should have correct values such as TUXDIR, APPDIR, TUXCONFIG, ULOGPFX, and CLOPT parameters
e.g 
===
TUXDIR="/home/tuxedo/OraHome_1/tuxedo12.1.3.0.0"
APPDIR="/home/tuxedo/TuxSvc"
TUXCONFIG="/home/tuxedo/TuxSvc/tuxconfig"
ULOGPFX="/home/tuxedo/TuxSvc"
CLOPT="-A -- -n //xx.xx.xxx.xxx:7777 -m3 -M10 -x 1 -p 17500 -P 19710"
===
Note that follow the document 'Preparing Tuxedo' step by step, especially for setting the tuxedo server environment variable WSNADDR that specified the WSL client will connect that is present at"https://docs.tibco.com/pub/activematrix-adapter-for-tuxedo/6.0.0-march-2010/pdf/tib_adtuxedo_configuration_and_deployment.pdf".