Append the tool count to the tool number. CQP0012 is required.

pread_writ_tl_buf_CQP0012
if n_tls_CQP0012 > 1,[
  b = 10
  while n_tls_CQP0012 >= b, b=b*10
  n$ = t$*b+n_tls_CQP0012
]
else, n$ = t$