A problem with runing the alt_dspbuilder_createComponentLibrary

>> alt_dspbuilder_createComponentLibrary

Error in block : Arria_II_GX_EP2AGX125_alteradspbuilder2/4-Bit DIP Switch

Java exception occurred:

com.altera.dspbuilder.simulation.MaskInitialisationException: Exception in block 'Arria_II_GX_EP2AGX125_alteradspbuilder2/4-Bit DIP Switch'

at com.altera.dspbuilder.simulation.Mask.init(Unknown Source)

Caused by: java.lang.NullPointerException

at com.altera.dspbuilder.simulation.Model.getAbsoluteTestbenchPath(Unknown Source)

at com.altera.dspbuilder.simulation.Model.getValidIOFile(Unknown Source)

at com.altera.dspbuilder.simulation.Model.getSaltFileForBlock(Unknown Source)

at com.altera.dspbuilder.simulation.blocks.IOBlock.getIOFile(Unknown Source)

at com.altera.dspbuilder.simulation.blocks.IOBlock.getIOFileNames(Unknown Source)

at com.altera.dspbuilder.simulation.blocks.IOBlock.access$000(Unknown Source)

at com.altera.dspbuilder.simulation.blocks.IOBlock$IOBlockLibrary$1.eval(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl.call(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl._factor(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl._term(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl._expr3(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl._expr2(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl._expr(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl._cond(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl._root(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl._top(Unknown Source)

at com.altera.etc.minieval.MiniEvalImpl.evaluate(Unknown Source)

at com.altera.dspbuilder.simulation.Block.calculateExpressionParameters(Unknown Source)

... 1 more

Error executing : save_system('Arria_II_GX_EP2AGX125_alteradspbuilder2', 'Arria_II_GX_EP2AGX125_alteradspbuilder2');

Previous command was : set_param('Arria_II_GX_EP2AGX125_alteradspbuilder2/PB1', 'Position', [160 312 200 358]);

Error using save_system (line 38)

An error occurred during a callback while saving

'C:\altera\12.1sp1\quartus\dsp_builder\bin\mdllibrary\Arria_II_GX_EP2AGX125_alteradspbuilder2.slx'.

The previously saved version of this file (if any) has not been changed.

Error in save_system (line 38)

throw(e);

Error in

C:\altera\12.1sp1\quartus\dsp_builder\bin\matlab\alt_dspbuilder_createComponentLibrary.p>alt_dspbuilder_createComponentLibrary

(line 28)

thanks very much ,it may be the problem when save as the .slx file.