Try to change
<PDM_IF "$ACCESS.FAC_chg" \> 1>
<PDM_IF "$args.active" == "1" && "$args.status" != "CL">
<PDM_IF "$prop.guest_user" != 1>
<PDM_MACRO name=button caption="Edit Change" func="pdm_submit('main_form','UPDATE')" hotkey_name="Edit Change" id=btn001>
</PDM_IF>
<PDM_MACRO name=button caption="Add Comment" func="add_activity_log('$args.persistent_id', true)" hotkey_name="Add Comment" id=btn002>
var query_str = cfgCgi + "?SID=$prop.SID+FID=$prop.FID" +
"+OP=CREATE_NEW+FACTORY=attmnt+NEXT_PERSID=$args.persistent_id" +
"+attmnt_parent=chg";
<PDM_MACRO name=button caption="Attach Document" func=browseWithURL(query_str) hotkey_name="Attach Document" id=btn004>
to
<PDM_MACRO name=button caption="Attach Document" func=browseWithURL(query_str) hotkey_name="Attach Document" id=btn004>
<PDM_IF "$ACCESS.FAC_chg" \> 1>
<PDM_IF "$args.active" == "1" && "$args.status" != "CL">
<PDM_IF "$prop.guest_user" != 1>
<PDM_MACRO name=button caption="Edit Change" func="pdm_submit('main_form','UPDATE')" hotkey_name="Edit Change" id=btn001>
</PDM_IF>
<PDM_MACRO name=button caption="Add Comment" func="add_activity_log('$args.persistent_id', true)" hotkey_name="Add Comment" id=btn002>
var query_str = cfgCgi + "?SID=$prop.SID+FID=$prop.FID" +
"+OP=CREATE_NEW+FACTORY=attmnt+NEXT_PERSID=$args.persistent_id" +
"+attmnt_parent=chg";