cvs conflict question

Hi all,
I'm using jenkins to remotely checkout cvs modules and perfome a build on the remote server. To perfomr all this, Jenkins calls up a bash script that performs cvs update and build the modules on the remote machine. Now upon updating modules, cvs complain about some files conflict and hence causing the build to abort and fail. But if i perfom the same update manually by sshing to the linux box, i do not have any issues. So i'm not sure where and what's causing this.....Here is the cvs cmd i'm using

cvs up -d -r sometag module

Is there a way how to force an update and ignore these conflicts. Because the files in CVSROOT and the workspace are the same. 

Any help will be greatly appreciated.

Ahmed