upgrade from 9.12 to 9.14UC8

i am migrating from 9.12 to 9.14, on the way to 9.20 its an hpux 10.20 platform, 1cpu. I have migrated one of the 4 instances to 9.14 ok: bringing down the instance , then simply copying over the config file into the new release etc/ directory, exporting INFORMIXDIR and INFORMIXSERVER and INFORMIXSQLHOSTS, brought the instance up using onmonitor and voila all was well. Things did not go well with the second instance however, although everything was the same procedure. I got some error messages and while in onmonitor tried mode->startup i guess once too much, because at that point i had a shared memory error. I finally have legato recovering back to the original instance as of 2 days ago, even tho its been in fast recovery for about 2 hours i am hopeful that all will come back up. If it doesn't i expect i will just have to go directly to reinitilize the disks as a 9.14 engine, and import the schemas . its almost a null database, mostly a development instance, but its useful to know how the procedure works, as well as what to expect from onbar. anybody have similar problems, maybe I'm missing an environment variable. also i noticed tmp filled up while it was recovering, mostly bar_act.log file, but it was at 100% allocated, and maybe that was part of the problem. how much space should there be to recover, is that an issue?