Yves,,
IMHO (and I am only a lowly bit fiddler with VSE background)
the problem is this
code in ISPFHTM
47F0F026 B OVER_EYECATCHER
21C9E2D7 C6C8E3D4 D340F0F0 F0F2F040 6040C2C1 E2C540D6 E261F3F9
*.00..ISPFHTML 00020 - BASE OS/39*
0976F020 F040D94B F1F0
OVER_EYECATCHER DS 0H
90EC D00C STM 14,12,12(13)
5890 1000 L 9,0(,1) <-------1
45E0 9184 BAL 14,x'184'(,9) <-------2
see the line with the <----1 either this receives the wrong value in R1
or the line with the <-----2 has the wrong offset for the jump/BAL onto where
r9 points now
without a little comment/hint, we have no idee what ISPFHTML expected....
to me this looks like someone called ISPFHTML with the wrong parms.
Martin