[Cppqed-support] Problem with fuzzy time bugfix

[Raimar S. <rai...@ui...>]

Dear András,

the bugfix #3482771

https://sourceforge.net/tracker/?func=detail&aid=3482771&group_id=187775&atid=922653

introduces a problem with my script 2ParticlesRingCavityFull. I am comparing 
the branches raimar/private/stable (without the fix) and 
raimar/private/development (with the fix), the testcase is one of my production 
runs:

2ParticlesRingCavityFull --deltaCSin -10 --minitSin 0.1 --evol single \
	--kappaCos 0.5 --etaSin 2 --fin2 5 --deltaCCos -10 --precision 6 \
	--dc 0 --minitCos 0.1 --modeCavSin Sin --T 300 \
	--cutoffSin 12 --modeCavCos Cos --pinit1 "(0.5 0 0.2 0)" \
	--pinit2 "(-0.5 0 0.2 0)" --UnotCos -5 --kappaSin 0.5 \
	--fin1 5 --seed 1001 --UnotSin -5 --Dt 1 --cutoffCos 5

In the development branch, the trajectory comes to a halt almost completely 
around t=90, while stable continues to run. So I cannot use the version with 
the fix at the moment.

The timesteps in development are only slightly smaller, on the order of 10^-5. 
In stable the timesteps are mostly on the order of 10^-4 and only sometimes 
10^-5.

As the simulation is quite slow I will provide a .sv file for t=89 to better 
reproduce the problem. From there maybe I can find out what is going on in the 
stepper.

Is it true that the bug #3482771 only happens without Hamiltonian? Would it be 
possible to test for that and introduce the time fuzziness only for such 
systems?

Best regards
Raimar