These are the only timescale commands that will work:
/timescale 0.2
/timescale 0.3
/timescale 0.4
/timescale 0.5
/timescale 0.6
/timescale 0.7
/timescale 0.8
/timescale 0.9
/timescale 1
/timescale 1.1
/timescale 1.2
/timescale 1.3
/timescale 1.4
/timescale 1.5
/timescale 1.6
/timescale 1.7
/timescale 1.8
/timescale 1.9
/timescale 2