I have a very weird problem on a new installation of Midas running also new code. My old code was written with the CAEN VME library and run from an older PC with a CAEN interface. I now moved to a GEFanuc V7769 with a Tundra II bridge and the frontend is using the UniverseII VME library. I'm mentioning this just to point out that the code is new, not just the Midas installation. I don't think the change of VME library has anything to do with my problem.

 

Anyway, except the VME access, the frontend code is the same. Especially, all accesses to the online data base are identical. The main problem I'm facing is that I can not create the record with the frontend configuration data in the ODB. Here is a bit of code from my frontend_init()

 

rstat = db_create_record(hDB, 0, OWNER_EQUIPMENT, v1740_conf_str);

if (rstat != DB_SUCCESS) {

  cm_msg(MERROR, frontend_name, "could not create record for the V1740 DAQ configuration");

  cm_msg(MERROR, frontend_name, "call to db_create_record returned %d", rstat);

 

  return rstat;

}

 

and these are some messages from the Midas log

 

Mon May 19 18:23:42 2014 [Charge Frontend,INFO] Program Charge Frontend on host lheppc78 started

Mon May 19 18:23:42 2014 [Charge Frontend,ERROR] [frontend.c:153:Charge Frontend,ERROR] could not create record for the V1740 DAQ configuration

Mon May 19 18:23:42 2014 [Charge Frontend,ERROR] [frontend.c:154:Charge Frontend,ERROR] call to db_create_record returned 320

Mon May 19 18:23:42 2014 [Charge Frontend,INFO] Program Charge Frontend on host lheppc78 stopped

 

The error 320 is essentially saying that there is a client which has already opened this key! But I'm pretty sure there is not!

 

I have checked the path OWNER_EQUIPMENT. I also used odbedit to make folders and variables in /Equipment/. I erased the hidden files in my data folder. I checked for experiment definition. I even follow an example in the docs how to clean up corrupted shared memory, erased /dev/shm.*, etc. I essentially checked item by item my old installation with the new one and everything seems the same.

 

So at this point I'm very puzzled!!! I don't know what to look for further. Do you have any idea what I could check for!?!

 

There were a few things that when wrong while getting ready the new installation but I solved them. So just to mention in case it is important.

 

A) I had difficulties to start the system on the new machine. Some hidden files in the data folder: .ODB.SHM .SYSTEM.SHM etc. where somehow created with root:root ownership and then mlogger et co. could not start! Also, some files in /dev/shm/ where created the same and it gave some problems. I solved these simply by chown all to user:group But I don't understand why this happened and I don't remember having to do that on my old system.

 

B) I use Slackware and I had this problem that instead of having the ODBC library I had only the iODBC and so I made the switch to that to be able to compile (which by the way seemed fine). I have no idea if this could somehow be related to my current problem.

 

Thanks a lot for your help!

 

Cheers,

Razvan Gornea