RUN command in BDL + Web Front End 3.54 - wrong return code?

Hello,

anybody out there using the latest version (3.54) of BDL compiler/DVM and 
Web Front End?
We have noticed some strange behaviour of the RUN command in  our Web 
application
(with on-the-fly generation/compilation of .per form files) in this 
version.

A very, very simplified example (main 4gl file):

DATABASE somedb

MAIN

DEFINE f_command CHAR(80),
                  ReCo INTEGER             # return code

  ... initializations, some other stuff; eventually generate someform.per 
...
  LET f_command = "fglform someform.per"
  RUN f_command RETURNING ReCo
  IF ReCo = 0 THEN
    ... do something with this form (OPEN WINDOW etc.) ... 
  ELSE
    ... something went wrong ...
  END IF

END MAIN 

If this is called via command line (FGLGUI=0) and someform.per is 
syntactically correct,
ReCo is 0 (as expected).

However, if this is called via the Web Front End, ReCo surprisingly is -1, 

_whether someform.per is syntactically correct or not_
(we can see the message "... form compilation was successful" in fglasd's 
output,
 if we start it in  debug mode and someform.per is valid).

It doesn't matter if we DEFINE  ReCo INTEGER or SMALLINT.

Our environment is:
- SuSE Linux Enterprise Server 9 (SLES 9, glibc 2.3.3)
- BDL compiler/DVM 3.54
- Web Front End 3.54

All this used to work with DVM 3.10 and Web Front End 3.10/3.20 (on older 
linux versions).
What are we missing/doing wrong?

-- 
Matthias Krauße
UNIX/INFORMIX Administration Group
active logistics Herdecke GmbH