Hi Ana
Yes, fmtfunc specifies a JavaScript function.
for CORS requests the following article might help:
https://www.html5rocks.com/en/tutorials/cors/
Regarding your Tab:
your tab is displaying a list containing zSolicitud records which fullfills the condition "cr=$args.persistent_id"
while $args.persistent_id is the persistent_id value of the Request "42"
You can check the content of the db with the following commands on the server:
to figure out the persistent_id of request42
bop_odump domsrvr cr "ref_num='42'" persistent_id
to get a list of zSolicitud records which are Point to request 42
bop_odump domsrvr zSolicitud "cr='persistent_id of request 42'" cr.ref_num
If this last command also diplays request 42 and 46, there is nothing wrong with the GUI tab, but maybe with your db content.
Regards
.........Michael