Declaring Structure as Global Variable

How do i declare structure as global variable. Matlab gives the following error as

      "The following error occurred converting from struct to double"

I declared as

global ABDQ_Result

 where ABDQ_Result is the structure name with objects  ABDQ_Result.E11,  ABDQ_Result.E22 are field names.

Thanks in advance for help...

[Jan]

Please copy the full error message and the line, which causes the error.

[Image Analyst]

That declaration would not cause that error.