Load dictionary for class via rootmap in PROOF

ROOT
1

Hello,

I have a TTree in which I stored a series of used-defined class type objects. There is a rootmap file in search path that maps the class to the library. When I browse my tree in a normal CINT session, the class is loaded automatically absolutely fine. Specifically, the following works:

TClass::GetClass("MyCustomClass")

I wrote a TSelector that uses TTreeFormula that make use of this custom class. It runs (Processes) fine in normal single-core mode. But when I try to run with proof-lite, it is crashing. I noticed in the logs that I have warnings from TClass that no dictionary is available for that type.

Should Proof recognise the rootmap files? Or must I use gProof->Load("/path/to/class/header.h") ? It would be nice if the rootmaps could be used automatically?

Correction: gProof->Load appears insufficient: I get warnings about ShowMembers not being found. My classes were compiled with reflex. Not sure how to get them to load on the TProofServLite correctly??

Will

2

Sorry for the noise. For future reference, there was no real problem here at all. I forgot that to get reflex dictionaries to load you needed to add a little kludge, which I had added years ago to my rootlogon.C (which prooflite does not use!?). I resolved my problems by adding:

gProof->Exec("gSystem->Load(\"libCintex\")");
   gProof->Exec("ROOT::Cintex::Cintex::Enable()");

And the library is automatically loaded correctly from there.

It would be good to know how I can set up proof-lite to use my rootlogon.C file by default though!

Anyway, main problem appears solved.

3

Hi,

Automatic loading of what can be automatically loaded in PROOF-Lite is on the list and we hope it will come sooner than later.
For the ‘rootlogon.C’, can you try by placing the following in your $HOME/.rootrc ?

Proof.Logon rootlogon.C

(add the full path if necessary …).

G. Ganis