Using Oracle 6 and Oracle 7 simultaneously

Dear all,

We have installed Oracle 7 a few weeks ago (version 7.0.15.4.0) and are transferring our Oracle 6 applications to the new version. At the same time, however, some of the users want to continue using the old version until they are confident that the new one is up and running.

If we start Oracle 6 first and then Oracle 7, every time we try to open an instance with Oracle 7 we get error ORA-07279: spcre: semget error, unable to get first semaphore set.

The same thing happens when we open an instance with Oracle 6 if version 6 was started after version 7.

What does this mean? Is it impossible to have both versions running in the same machine? We use a Sun Sparcstation with SunOS 4.1.4.

Thanks in advance.

Joaquim Areia Capitao
joaquim.capitao_at_jrc.it Received on Wed May 03 1995 - 00:00:00 CEST