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It is not clear what you mean. API DISTBUSFAULT_2 was introduced in rev 34.0 and is not available in rev 33.5! This API cannot calculate the equivalent positive shunt admittance.

Since you have sequence data in your saved case you can use the following APIs in the simulation:

Use API dist_scmu_fault to simulate an unbalanced fault at bus. Here you have the option on how DC and FACTS shall be treated (block and ignore, or convert to constant admittance load)

Use API dist_spcb_fault_2 to simulate an unbalanced in-line fault. Also here there is an option for FACTS.