NWDS 7.3 DC Build Error

Hi Experts,

I am currently building a DC in NWDS 7.3 and got an error - related to a required external library of my java application.

See error form build log:

[javac] ERROR: C:\Users\carinogr\Documents\NWDS\Workspace2.jdi\5\DCs\fss\atgmigap\dc_apreport_ear\_comp\src.core\com\fss\atgmigap\pagedet.java:49: package org.apache.commons.collections does not exist

What should the next steps be?

Regards