Fixing timestep too small error/starting all initial sources at zero ?

[pablo_sole...@brown.edu]

I am simulating a sensor for a project and I get this error when I run xyce on the netlist:

 I have this analysis line:

******Analysis********

.tran 10u 150m

.print tran PRECISION=6 WIDTH=8 v(2) v(4) v(5) v(9)

*Initial Condition Guesses:

.NODESET  V(9)=1.8V ;(SR LATCH NODE)

.NODESET  V(10)=0V  ;(SR LATCH NODE)

;.NODESET  V(5)=1.8V

;.NODESET  V(4)=0V

***********************

And the following independent sources (which I try to make zero initially to see if the simulation converges more quickly)

* Independent Voltage Sources

Vdd 1 0 PULSE(0 1.8 10u)

;Vdd 1 0 1.8V ;

* Independent Current Sources

Iref1 1 2 PULSE(0 {IREF} 10u)

Iref2 1 3 PULSE(0 {IREF} 10u)

How do I 

A) make sure that the simulation converges more quickly (without these pulses on the independent sources I am getting a painfully long simulation time)? Specific Initial conditions, netlist commands,etc?

B) reliably/systematically/synchronously start the independent sources at 0?

C) avoid this kind of timestep error?