Error: Failed to refresh PTF file G:/ExerciseProgramfiles/NiosIILAB/kernal.ptf (-1)

Rencently i am using sopc builder to build a small sopc projcet （the following picture）

http://www.alteraforum.com/forum/attachment.php?attachmentid=6830&d=1361347799&thumb=1 (http://www.alteraforum.com/forum/attachment.php?attachmentid=6830&d=1361347799)

when finished an try to generate an error turned up as follws：

i'm using win7 + qii 11.0 + nios 11.0

error: failed to refresh ptf file g:/exerciseprogramfiles/niosiilab/kernal.ptf (-1)

info: finished elaborating module.

executing: d:/altera/11.0/quartus//sopc_builder/bin/sopc_builder --classic --generate g:/exerciseprogramfiles/niosiilab/kernal.ptf

error: couldn't run process d:/altera/11.0/quartus//sopc_builder/bin/sopc_builder --classic --generate g:/exerciseprogramfiles/niosiilab/kernal.ptf successfully

this picture is the errors:

http://www.alteraforum.com/forum/attachment.php?attachmentid=6829&d=1361347556&thumb=1 (http://www.alteraforum.com/forum/attachment.php?attachmentid=6829&d=1361347556)