timestep too small for energy harvesting circuit

[studystudystudy]

i have design a simply energy harvesting circuit, and i try to stimulate it, but it tell me that my circuit timestep too small.

the full error report as following:

singular matrix: check nodes $i1_open_2 and $i1_open

singular matrix: check nodes $i1_open_2 and $i1_open

singular matrix: check nodes $i1_open_2 and $i1_open

TRAN: Timestep too small; initial timepoint: trouble with (1bh62_diode_1) dd5

doAnalyses: timestep too small.

this error keep appear . i almost crazy with that

what does it mean by timestep to small?

i have attach the .ms9 file, hope anyone of you can help me figure it out. 

[KateB]

I open your file, and run the simulation, but there's no troble found.

Could you please show me a step to reproduce a problem?

[studystudystudy]

i have simulate it again, the timestep problem disappear.

thanks god

[studystudystudy]

how to use the push button , when everytime i simulate, the simulation is ok, but when i press push button, the timestep problem appear. 

i using the normally close push button. when i press during the simulation, the timestep problem appear.

[KateB]

http://digital.ni.com/public.nsf/allkb/4B99B2CD6C0C3B6A86257205005D58E0

[Tang_Lihua]

Hi, I have some experience of simulation of energy harvesting system using Multisim, you can contact me : tanglihua821229@gmail.com