; have you editted texhdr to lower varsize?
.del/q texsem.rel,texsyn.rel,texprs.rel,texext.rel,texhyf.rel,texpre.rel,texsys.rel

File not found.  DSK:TEXSEM.REL[ARK,TEX].
File not found.  DSK:TEXSYN.REL[ARK,TEX].
File not found.  DSK:TEXPRS.REL[ARK,TEX].
File not found.  DSK:TEXEXT.REL[ARK,TEX].
File not found.  DSK:TEXHYF.REL[ARK,TEX].
File not found.  DSK:TEXPRE.REL[ARK,TEX].
File not found.  DSK:TEXSYS.REL[ARK,TEX].

Exit
↑C
.com texsem,texsyn,texprs,texext,texhyf
Swapping to SYS:SAIL.DMP
SAIL: TEXSEM.SAI 1 2
  TEXHDR.SAI 1 2 3 4 5 6 7
 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
TEXSYN.SAI 1 2
  TEXHDR.SAI 1 2 3 4 5 6 7
 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
TEXPRS.SAI 1 2
  TEXHDR.SAI 1 2 3 4 5 6 7
	Note: This output module prepares Press files only. 
 3 4 5 6 7 8 9
TEXEXT.SAI 1 2
  TEXHDR.SAI 1 2 3 4 5 6 7
 3 4 5 6 7 8 9 10
TEXHYF.SAI 1 2 3 4 5 6 7 8


Exit
↑C
.ex texpre(5000S)
Swapping to SYS:SAIL.DMP
SAIL: TEXPRE.SAI 1 2
  TEXHDR.SAI 1 2 3 4 5 6 7
 3 4 5 6 7 8 9 10 11 12
LOADING

LOADER 236 PAGES
EXECUTION

Hash table of size 1009 preloaded with 266 control sequences.
Furthermore 48 single-character control sequences are predefined.
Exception table contains 306 entries in ordered hash table of size 337.

N