Resolution:
While creating the shared ear using domain utility in BWC 5.5, BW, TRA or Formbuilder hotfix jars are not included.

You need to modify the &ltTIBCO_HOME>/bwc/5.5/bui/config/CreateSharedEAR.xml for picking up the hotfix/lib jars for BW, TRA and FormBuilder.

Following are the entries to be added in the ant target “getFBjars” in CreateSharedEAR.xml:

1. For FormBuilder hotfix jars:
        &ltcopy toDir="${SHARED_ARCHIVE_TMP_DIR}">
            &ltfileset dir="${TIBCO_FORMBUILDER_HOME}/hotfix/lib">
                &ltinclude name="*.jar"/>
            </fileset>
        </copy>
2. For BW hotfix jars:
        &ltcopy toDir="${SHARED_ARCHIVE_TMP_DIR}">
            &ltfileset dir="${TIBCO_BW_HOME}/hotfix/lib/">
                &ltinclude name="*.jar"/>
            </fileset>
        </copy>  
3. For TRA hotfix jars:
        &ltcopy toDir="${SHARED_ARCHIVE_TMP_DIR}">
            &ltfileset dir="${TIBCO_TRA_HOME}/hotfix/lib">
                &ltinclude name="*.jar"/>
            </fileset>
        </copy>


Please make sure that the entries for hotfix lib jars precede the product lib jars in the XML. So the actual entries in CreateSharedEAR.xml would look like this:

<!-- Following entry added for including Formbuilder hotfix jars -->
        &ltcopy toDir="${SHARED_ARCHIVE_TMP_DIR}">
            &ltfileset dir="${TIBCO_FORMBUILDER_HOME}/hotfix/lib">
                &ltinclude name="*.jar"/>
            </fileset>
        </copy>
<!-- End -->
        &ltcopy toDir="${SHARED_ARCHIVE_TMP_DIR}">
            &ltfileset dir="${TIBCO_FORMBUILDER_HOME}/lib">
                &ltinclude name="*.jar"/>
            </fileset>
        </copy>

.
.
.
<!-- Following entry added for including BW hotfix jars -->
        &ltcopy toDir="${SHARED_ARCHIVE_TMP_DIR}">
            &ltfileset dir="${TIBCO_BW_HOME}/hotfix/lib/">
                &ltinclude name="*.jar"/>
            </fileset>
        </copy>  
<!-- End -->
        &ltcopy toDir="${SHARED_ARCHIVE_TMP_DIR}">
            &ltfileset dir="${TIBCO_BW_HOME}/lib/">
                &ltinclude name="*.jar"/>
            </fileset>
        </copy>
.
.
.
<!-- Following entry added for including TRA hotfix jars -->
        &ltcopy toDir="${SHARED_ARCHIVE_TMP_DIR}">
            &ltfileset dir="${TIBCO_TRA_HOME}/hotfix/lib">
                &ltinclude name="*.jar"/>
            </fileset>
        </copy>
<!-- End -->
        &ltcopy toDir="${SHARED_ARCHIVE_TMP_DIR}">
            &ltfileset dir="${TIBCO_TRA_HOME}/lib/">
                &ltinclude name="TIBCrypt.jar"/>
            </fileset>
        </copy>

Update the CreateSharedEAR.xml with the above-mentioned entries and then create the shared ear using domain utility or domainutilitycmd.