positive_column_1d example ...

Hi,

In positive_column_1d example in Plasma Module :

I receive the following error massage, when I increase applied voltage V0 from 100 V to e.g 1000 V :

Repeated error test failures. May have reached a singularity.
Time : 4.778827037879742e-006
Last time step is not converged.

This massage also occurs for other examples.
How one can resolve this difficulty ?

In my work, I need to increase the voltage to several kV and e.g. 20 microsecond.

Thanks a lot for your kind attention in advance.

Kind Regards,
Mona