Voltage port excitation

Hello guys. I need to apply 2 excitations with a phase delay on one of them. I've thinked to use the voltage port excitation which has this opportunity but I get this error:

Array2PatchVoltaggio (C:/Users/Emme/Documents/Ansoft_Projects/)
[error] 'GainTotal' is not a defined variable name in this context. (10:32 ott 11, 2010)
HFSSDesign1 (DrivenModal)
[warning] Warning - Boundary 'Rad1' and Boundary 'FiniteCond2' overlap. (11:10 ott 11, 2010)
[warning] Warning - Boundary 'FiniteCond1' and Boundary 'FiniteCond2' overlap. (11:10 ott 11, 2010)
[warning] Warning - Boundary 'Rad1' and Boundary 'FiniteCond1' overlap. (11:12 ott 11, 2010)
[warning] Warning - Boundary 'Rad1' and Boundary 'FiniteCond2' overlap. (11:12 ott 11, 2010)
[warning] Warning - Boundary 'FiniteCond1' and Boundary 'FiniteCond2' overlap. (11:12 ott 11, 2010)
[warning] Warning - Boundary 'Rad1' and Boundary 'FiniteCond1' overlap. (11:12 ott 11, 2010)
[warning] Warning - Boundary 'Rad1' and Boundary 'FiniteCond2' overlap. (11:12 ott 11, 2010)
[warning] Warning - Boundary 'FiniteCond1' and Boundary 'FiniteCond2' overlap. (11:12 ott 11, 2010)
[error] Communication failure. System error no: 109, error description:Unknown error (11:14 ott 11, 2010)
[error] Communication failure. System error no: 0, error description:No error (11:14 ott 11, 2010)
[error] Fast sweep setup, process hf3d exited with code -1073741819. (11:14 ott 11, 2010)
[error] Simulation completed with execution error on server: Local Machine. (11:14 ott 11, 2010)

What can I do?

Thank you for attention.

The thruble was in the Fast simulation; I've solved doing the normal one.