T1=V_REF*c​os(30+alph​a)/sin(60)​;

I have written a M-code for BBCS-1 (7 pulse mode), pulse patterns came accordingly.But for my work i need to use that M-code through level-2 M-file,because of which the positive and negative clamping of pulse patterns got disturbed when we increase or decrease the modulation index except for V_REF =0.866.I checked thouroughly and came to a conclusion that the value which should come in variable T1 is computing wrongly but the value of V_REF and alpha are loading correctly.