lscm login command result is different with same credentials at different times

Hi,

I am using scmtools 602 to login to rtc server via jenkins job. The job outcome is different everytime. AT times login is successful and others it throws

+ lscm login -r <https://myrtcserver> -n local -u <my user name> -P RTCPassword
Problem running 'login':
Could not log in to <https://myrtcserver> as user <my user name>: CRJAZ0124E The user name or password is invalid.
CRJAZ0124E The user name or password is invalid.
Check the log for details about the error at "/root/.jazz-scm". If you have configured custom logging check your log configuration settings for the path to the log file.

Other times same job runs fine without any changes

+ lscm login -r <https://myrtcserver> -n local -u <my user name> -P RTCPassword
Logged in to <https://myrtcserver>

From Jenkins RTCPassword is used as password parameter -> secret text

scmtools version:
Build Id: RTC-CLIENT-I20160323-2215
Version: 6.0.2

RTC server : 602



Any suggestion on what could be reason for inconsistency ?

Thanks.