Qsys-script error

When I run the Qsys-script I get the following "Error"-Message, although QSys is generated.

Does anyone know why I get this "Info: Error: Command failed"?

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Info: Generating vhdl from qsys project...

Info: cmd : c:/altera/13.1/quartus/sopc_builder/bin/qsys-generate.exe

Info: args : "D:/Project/Firmware/Fieldbus/FPGA_Alt_EPC4/NiosSystemCAN/NiosSystem.qsys" --synthesis=VHDL --package-version=13.1 --family="Cyclone IV E" --part="EP4CE40F23I7"

Info: catch: 1

Info: error: command failed: c:/altera/13.1/quartus/sopc_builder/bin/qsys-generate.exe "D:/Project/Firmware/Fieldbus/FPGA_Alt_EPC4/NiosSystemCAN/NiosSystem.qsys" --synthesis=VHDL --package-version=13.1 --family="Cyclone IV E" --part="EP4CE40F23I7"

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