The QSPICE documentation for the Behavioral Current source indicates that “RPAR” and "IC are optional parameters. I can append a value of RPAR following the expression, but adding “ic=0” causes a warning to be thrown. The warning is:
Warning: Ignoring unknown instance parameter “IC” of device B1.
I could understand making “0” the default, but it throws the same warning for non-zero values as well.