The OPAL Discussion Forum

[Dou Guoliang <douguoliang AT impcas.ac.cn>]

Hi ,all 

When I use the command "DUMPFIELDS" and "DUMPEMFIELDS" , the opal_2.4 shows the error (annex 1):

Error> *** Error:

Error> Internal OPAL error:

Error> Assertion 'idx.i < num_gridpx_m - 1' failed.

Error> idx.i = 118, num_gridpx_m - 1 = 118.000000

Error> in

Error> /afs/psi.ch/user/g/gsell/private/src/OPAL/src/src/Classic/Fields/FM3DH5BlockBase.h, line 163

I have checked my inputfile ,and there is no wrong experssion. The detailed experssion is :

DUMPEMFIELDS, COORDINATE_SYSTEM = Cartesian, X_START= -0.8, X_STEPS=1601, DX= 0.001, Y_START=-0.25, Y_STEPS=501, DY= 0.001, Z_START=-0.02, Z_STEPS=41, DZ=0.001, T_START=0,T_STEPS=1, DT=0.1 ,FILE_NAME="FIELDEM-MAPXYZ.dat";

When I try to split the original output area of X into two parts, opal can output the corresponding two parts normally. First change X_STEPS to 117, and then change X_START and X_STPES  to -0.215 and 204.

And I re-ran another cyclotron simulation and got the same error, except idx.i changed to 14 .

In addition, I found that the unit of position coordinates of command  "DUMPEMFIELDS" and "DUMPFIELDS" in the opal is defined as meters, but in fact, the table head of the output file shows the unit of position coordinates is millimeter. (annex 2)

Has anyone met this error?

Best regards,

Dou 

	Dou Guoliang Institute of Modern Physics Chines Academy of Science
douguoliang AT impcas.ac.cn

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