Out of curiosity, I tried setting up a VM/SP guest in VM/ESA and the RSCS NJE link works over a VCTCA, so it does look like the CTCE emulation (or my configuration of it) may be missing something.
On the other hand though Dutch, if running as a guest will work for your project, you now have a workaround for your issue.
On JS04 (VM/ESA):
?send rscs q v 621
RSCS??? : CTCA 0621 COUPLED TO? JS21???? 0600 SUBCHANNEL = 000A
RSCS??? : Ready;
Ready; T=0.01/0.01 04:52:58
?smsg rscs q js21
RSCS??? : 05:01:44 Location JS04(OPERATOR) executing: Q JS21
?Link???????????????????????? Line
?Name???? Status???? Type???? Addr Hold Trace Drain
?JS21???? connect??? NJE????? 0621 no?? none? no
Ready; T=0.01/0.01 05:01:44
On JS21 (VM/SP 4):
q 600
03:53:08 CTCA 600 ATTACH TO RSCS???? 600
R; T=0.01/0.01 03:53:08
smsg rscs q js04
RSCS??? : 04:02:38 DMTCMX005I Location JS21(OPERATOR) executing: Q JS04
?Link???????????????????????? Line
?Name???? Status???? Type???? Addr Hold Trace Drain
?JS04???? connect??? NJE????? 0600 no?? none? no
R; T=0.01/0.01 04:02:38
Jeff
