MFront MCC Model failing

Hello,

Trying to run the ModCamClay_semiExpl behvaiour from MaterialLib/SolidModels/MFront but on another mfront build
added a line of my own v = v0; on line 92 of the .mfront behaviour file but the rest is the same
ModCamClay_semiExpl.zip

mfront --obuild --interface=generic ModCamClay_semiExpl.mfront
mtest ModCamClay_semiExpl.mtest --xml-output --xml-output

integration is failing, what is the best way to debug it?

$mfront --version
tfel
Version : 4.0.0

error message:

No hypothesis defined, using default

Beginning of test suite 'MTest/ModCamClay_semiExpl'
** no prediction
resolution from 0 to 0.1

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Dividing time step by two

resolution from 0 to 0.05

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Dividing time step by two

resolution from 0 to 0.025

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Dividing time step by two

resolution from 0 to 0.0125

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Dividing time step by two

resolution from 0 to 0.00625

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Dividing time step by two

resolution from 0 to 0.003125

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Dividing time step by two

resolution from 0 to 0.0015625

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Dividing time step by two

resolution from 0 to 0.00078125

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Dividing time step by two

resolution from 0 to 0.000390625

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Dividing time step by two

resolution from 0 to 0.000195313

MTest::computeStiffnessMatrixAndResidual : behaviour intregration failed
Execution failed (GenericSolver::execute: maximum number of sub stepping reached)
-number of period:     0
-number of iterations: 10
-number of sub-steps:  10