2nd order high pass filter PSPICE error
It looks like you connected in parallel two, or more voltage sources. Looking over the pictures it seems that in addition to the supply, V1, you also have V2 and V5 -- since you made the supply internal to the subcircuit. Delete V1 and leave the two outside, only. Better yet, make only one of them as a supply and connnect the two subcircuit instances to that.



Just to make sure, the voltage source is, ideally, with a zero internal resistance. If you connect two in parallel, each source will try to ouput a current with the value of its voltage divided by the resistance of the other, which is zero, which cannot be. Similarly for two current sources in series.