Forum OpenACS Q&A: Problem running OACS 4.6.2 and 3.2.5 on the same server

I already set up several servers with oacs 4.5 and 3.2.5 without a problem (with older releases), but now I get a strange error.

I set up my new server with RedHat 8.0, PostgreSQL 7.2.3, Aolserver 3.3+ad13 and OACS 4.6.2 and all is running fine.
After that I dumped and restored my old 7.1 database, untarred my 3.2.5 instance, changed a bit the nsd.tcl and started a second instance of Aolserver, getting this error when trying to access the site

[15/Apr/2003:09:49:11][3930.32773][-conn0-] Error: Ns_PgExec: result status: 7 message: ERROR:  fmgr_info: function 16556: cache lookup failed

[15/Apr/2003:09:49:11][3930.32773][-conn0-] Error: dbinit: error(localhost::urbis,ERROR:  fmgr_info: function 16556: cache lookup failed
): 'select nextval('sec_id_seq') from dual'
[15/Apr/2003:09:49:11][3930.32773][-conn0-] Error: Filter sec_read_security_info returned error #1: Database operation "1row" failed (exception NSDB, "Query was not a statement returning rows.")
[15/Apr/2003:09:49:11][3930.32773][-conn0-] Error: tclop: invalid return code from filter proc 'Critical filter sec_read_security_info failed.': must be filter_ok, filter_return, or filter_break
[15/Apr/2003:09:54:05][3930.40965][-conn1-] Error: Ns_PgExec: result status: 7 message: ERROR:  fmgr_info: function 16556: cache lookup failed

[15/Apr/2003:09:54:05][3930.40965][-conn1-] Error: dbinit: error(localhost::urbis,ERROR:  fmgr_info: function 16556: cache lookup failed
): 'select nextval('sec_id_seq') from dual'
[15/Apr/2003:09:54:05][3930.40965][-conn1-] Error: Filter sec_read_security_info returned error #1: Database operation "1row" failed (exception NSDB, "Query was not a statement returning rows.")
[15/Apr/2003:09:54:05][3930.40965][-conn1-] Error: tclop: invalid return code from filter proc 'Critical filter sec_read_security_info failed.': must be filter_ok, filter_return, or filter_break

I searched the forum and Google, but I didn't find anything useful and so any help would be very appreciated.
looks like you're running into one of the incompatibilities 3.2.5 has with PG 7.2.  I posted a list of these, with links to solutions, here:

https://openacs.org/forums/message-view?message_id=34110

(Shortly after that post I upgraded to 7.2 myself; I haven't found any other problems since.)

Thank You Jonathan,
this solved the problem.