Weird numbers when compiling macro

From: Florian Sittel <sittel_at_lettis.net>
Date: Tue, 21 Sep 2010 21:33:59 +0200

Hello fellow ROOT-users and developers,

I am new to ROOT and I hope this is the right place to ask this question:

I wrote some little macros to process some data. In short, I produce several graphs from different csv-files and fit a sinusoidal function to them. Nothing special here.
The macros run OK when running through CINT. The output is as follows (numbers are amplitudes of sinusoidal fit, the last numbers are just 2*amplitudes):

# root messung3.C

root [0]

Processing messung3.C...
mes3_2_HM1508.csv	0.678808 +/-0.000605315		1.35762
mes3_4_HM1508.csv	1.46738 +/-0.000653343		2.93476
mes3_6_HM1508.csv	1.65165 +/-0.00108274		3.3033
mes3_7_HM1508.csv	1.68977 +/-0.00129468		3.37955
mes3_8_HM1508.csv	1.74871 +/-0.00111871		3.49742

root [1] .q
root -l messung3.C 12,15s user 0,08s system 85% cpu 14,282 total

These numbers seem to be correct.

Anyway, if I compile the macro and run it, I get random numbers:

first run:

# root messung3.C++

root [0]
Processing messung3.C++...
Info in <TUnixSystem::ACLiC>: creating shared library

/somePath/./messung3_C.so
mes3_2_HM1508.csv	2684.47 +/-2508.35		5368.95
mes3_4_HM1508.csv	1142.86 +/-14.5639		2285.71
mes3_6_HM1508.csv	2493.13 +/-1758.83		4986.25
mes3_7_HM1508.csv	2465.53 +/-55480.5		4931.06
mes3_8_HM1508.csv	1.74871 +/-0.00111871		3.49742

root [1] .q

second run:

# root messung3.C++

root [0]
Processing messung3.C++...
Info in <TUnixSystem::ACLiC>: creating shared library /somePath/./messung3_C.so

mes3_2_HM1508.csv	0 +/-7.69996e+31		0
mes3_4_HM1508.csv	0 +/-7.69996e+31		0
mes3_6_HM1508.csv	0 +/-7.69996e+31		0
mes3_7_HM1508.csv	0 +/-7.69996e+31		0
mes3_8_HM1508.csv	1.74871 +/-0.00111871		3.49742

third run:

# root messung3.C++

root [0]
Processing messung3.C++...
Info in <TUnixSystem::ACLiC>: creating shared library /somePath/./messung3_C.so

mes3_2_HM1508.csv	0.678808 +/-0.000605315		1.35762
mes3_4_HM1508.csv	1.46738 +/-0.000653343		2.93476
mes3_6_HM1508.csv	1.65165 +/-0.00108274		3.3033
mes3_7_HM1508.csv	1.68977 +/-0.00129468		3.37955
mes3_8_HM1508.csv	7.62246e+11 +/-2.00788e+13		1.52449e+12

Interestingly, sometimes some numbers are correct, while during the same run, others get messed up.

I thought, maybe ROOT doesn't reset memory properly, so I added a gROOT->Reset() before every single graph-generation and fit. No change here.
Even when I quit ROOT and re-run it the data gets messed up.

The code is a bit complex to post here, but I hope there is somebody, who has experienced a similar problem before. Perhaps it is just some trivial setting.

Thanks in advance,

        Florian Received on Tue Sep 21 2010 - 21:34:28 CEST