Under Universe if I attempt to read a record (using READ) from a part file
but using a key which actually maps (via the partitioning algorithm) to a
different part file - then the READ just takes the ELSE clause without
setting STATUS() to anything.
Altering the program to use READU instead of READ and the ELSE clause is
still taken - but this time STATUS() is set to 2.
Looking in the Universe Basic manual I can't find mention of what a STATUS()
value of 2 means in relation to a READU statement (although it does say -2
(negative 2) signifies "the part number is invalid". I checked ED.B and
COPY.B in the uv BP file, and both of these programs specifically check for
a STATUS() value of 1 or 2 after doing a READU and then display an
appropriate error message relating to part files and distributed files.
What I can't understand is why the READ (without setting a lock) doesn't
return the same STATUS(). How am I supposed to determine that the reason the
record wasn't found was due to key being invalid and not just because it
If I remember correctly under PI/Open when attempting to READ (or READU) a
record using an incorrect key, the program would take the ON ERROR clause
with STATUS() being set to 32240.
Another related problem were having at the moment - when attempting to read
a VALID record from a part file via uvnet using READ - the record is read
correctly BUT using READU the ELSE clause is taken and again STATUS()
returns 2 even though the record does exist in the file. Any ideas on this
Disclaimer. This e-mail is private and confidential. If you are not the
intended recipient, please advise us by return e-mail immediately, and
delete the e-mail and any attachments without using or disclosing the
contents in any way. The views expressed in this e-mail are those of the
author, and do not represent those of this company unless this is clearly
indicated. You should scan this e-mail and any attachments for viruses. This
company accepts no liability for any direct or indirect damage or loss
resulting from the use of any attachments to this e-mail.
u2-users mailing list