Compiler Error C2217

'attribute1' must be used with 'attribute2'

The first function attribute requires the use of the second attribute.

Some causes for this error include:

• An interrupt function explicitly declared as near. Interrupt functions must be declared as far.
  
  
• An interrupt function that is declared with the __fortran, __pascal, or __fastcall attribute. Functions declared with the __interrupt attribute must use  C calling conventions.
  
  
• __pascal, or __fastcall attribute. These functions must use C calling conventions. Remove the __fortran, __pascal, or __fastcall attribute from the function declaration.