Is it possible to put a zero value in the source definition?

Yann_Le_Floch

Yes, it is, but if you set 0 A in the current source, it may lead to some numerical problems. It means that with a zero value in a current source (and it is a particular case) a particular matrix is built and it may lead to numerical instability. It is better to use a small value of the current (1E-4A) instead of 0.