This happens when you have Developer 61 FP1 installed, so do the following steps:
Shutdown the TNConsole:Backup the console.bat
Edit the TNConsole\bin\console.bat and modify the CLASSPATH accordingly to make the developer open from TNConsole.
SET
CLASSPATH=“%B2BDEVDIR%\lib\proxy.jar;%JAVA_ROOT%\lib\rt.jar;%CONSOLEDIR%\lib
\tnproxy.jar;%SSL_PATH%”;C:\webMethods\webMethods61\common\lib\fabricClient.jar
At the end restart the TNConsole session.
HTH,
RMG
#Integration-Server-and-ESB#B2B-Integration#webMethods