Why do I receive a segmentation violation when using the GET_PARAM function on my masked block in Simulink 6.2 (R14SP2)?

I have a masked block in my custom library. When using the following commands:

find_system('LIBRARY_NAME','LookUnderMasks','on','FollowLinks','on','Mask','on'); 

get_param('MASKED_BLOCK_NAME','ObjectParameters')

I receive the following segmentation violation:

 ------------------------------------------------------------------------ 

        Segmentation violation detected at Wed Mar 16 11:43:08 2005 

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 Configuration: 

   MATLAB Version:   7.0.4.365 (R14) Service Pack 2 

   MATLAB License:   unknown 

   Operating System: Microsoft Windows XP 

   Window System:    Version 5.1 (Build 2600: Service Pack 2) 

   Processor ID:     x86 Family 15 Model 2 Stepping 9, GenuineIntel 

   Virtual Machine:  Java 1.5.0 with Sun Microsystems Inc. Java HotSpot(TM) Client VM 

     (mixed mode, sharing) 

   Default Charset:  ibm-5348_P100-1997 

 Register State: 

   EAX = 00000002  EBX = 0889d860 

   ECX = 083f83f0  EDX = 023b3dc0 

   ESI = 00000002  EDI = 01325c38 

   EBP = 00cddbb0  ESP = 00cddbac 

   EIP = 784629db  FLG = 00010202 

 Stack Trace: 

   [0] libmx.dll:_mxDestroyArray(2, 6, 0x79eaf650, 0) + 11 bytes 

   [1] simulink.dll:struct mxArray_tag * __cdecl get_simulink_object_parameters(void const *)(0x06478de0, 6, 0x032767cc, 0xffffffff) + 1254 bytes 

   [2] simulink.dll:_get_param(0x06478de0, 0x084164e0 "ObjectParameters", 0x00cddfec, 0x7a14b898) + 895 bytes 

   [3] simulink.dll:struct slErrMsg_tag * __cdecl get_block_object_param(void *,char const *,struct mxArray_tag * *)(0x06478de0, 0x084164e0 "ObjectParameters", 0x00cddfec, 0) + 751 bytes 

   [4] simulink.dll:struct slErrMsg_tag * __cdecl get_param_switchyard(void *,char const *,struct mxArray_tag * *)(0x084164e0 "ObjectParameters", 0x00cddfec, 1, 0x030dc500) + 164 bytes 

   [5] simulink.dll:_matl_get_param(1, 0x00cddfec, 0x06478de0, 0x00cde04c) + 593 bytes 

 <snip>

Answer 1

[MathWorks Support Team]

This bug has been fixed in Release 14 Service Pack 3 (R14SP3). For previous product releases, read below for any possible workarounds:

We have verified that there is a bug in Simulink 6.2 (R14SP2) in the way that the GET_PARAM function handles masked blocks when the mask and the block being masked have parameters that use the same variable names.

To work around this issue, avoid using variable names for mask parameters that are being used for parameters of the masked block.