How to get rid off the errors mentioned below while generating c code from simulink model?

I am getting the below mentioned errors while building the model in simulink. Please let me know how to get rid off these error. Thanks in advance.

Errors Log

TARGET COMPILER "C:\Program Files\dSPACE RCPHIL 2017-B\Compiler\PPCTools"

COMPILING "UARTdspacetest2.c"

(E) C0020; "UARTdspacetest2.c", line 77 pos 14; identifier "MAX_uint64_T" is undefined result = MAX_uint64_T; ^

(E) C0020; "UARTdspacetest2.c", line 149 pos 22; identifier "MAX_uint64_T" is undefined ldword = MAX_uint64_T; ^

(E) C0020; "UARTdspacetest2.c", line 151 pos 22; identifier "MAX_uint64_T" is undefined ldword = MAX_uint64_T; ^

(E) C0020; "UARTdspacetest2.c", line 165 pos 26; identifier "MAX_uint64_T" is undefined ldword = MAX_uint64_T; ^

(E) C0020; "UARTdspacetest2.c", line 177 pos 28; identifier "MAX_uint64_T" is undefined ldword = MAX_uint64_T; ^

(E) C0020; "UARTdspacetest2.c", line 207 pos 26; identifier "MAX_uint64_T" is undefined ldword = MAX_uint64_T; ^

(E) C0020; "UARTdspacetest2.c", line 287 pos 16; identifier "MAX_uint64_T" is undefined ldword = MAX_uint64_T; ^

7 Errors COMPILING FAILED (1) MAKE PROCESS ABORTED ----------------------------------------------------------------------

*** Errors occurred during make process.

*** Inspect MATLAB Command Window for details.

*** Aborting RTI build procedure for model UARTdspacetest2. ----------------------------------------------------------------------

*** Stopped RTI build procedure for model: UARTdspacetest2. ------------------------------------------------------------

[Ganesh Regoti]

I am unable to reproduce the issue. Can you share the model or prototype of it throwing the same error?