Precedence Constraint Issue

I am struggling here with precendece constraints and variables.

I have the following scenario:







Task A





Task B





Task C





@var1!=0





@var1==0
Task A, Task B and TaskC

Task A (Execute SQL Task which assigns a value to a variable say, var1) determines if TaskB will execute i.e.

IF var1 !=0 Execute Task B and then Execute Task C

IF var1== Execute Task C

Is this possible in SSIS?

Problem:
Each time I try to do this, the package never executes Task C. It always either Executes Task A or Task A and Task B.


For example if var1 !=0 it executes Task A and Task B

but if var1 == 0 it executes only Task A.