strange results with IORD IOWR

Hi there,

I've made my custom component with 64bit input vector and 8bit output, successfuly connected to system interconnection fabric.

In nios2-ide when I try to send vector to my component using IOWR i get warning:

alt_u64 uwektor1=0x17463f8c62ae;
IOWR(SSN_COMPONENT_WE_BASE, 0, uwektor1);

I get:

--- Quote Start ---

warning: integer constant is too large for "long" type

--- Quote End ---

And then the results read using:

result=IORD_8DIRECT( SSN_COMPONENT_WY_BASE, 0 );

are strage.

Moreover, such a code:

        IOWR(SSN_COMPONENT_WE_BASE, 0, uwektor1);
        result=IORD_8DIRECT( SSN_COMPONENT_WY_BASE, 0 );
        printf("0x%X \n",result);
  
        result=IORD_8DIRECT( SSN_COMPONENT_WY_BASE, 0 );
      printf("0x%X \n",result);

gives me two different results?!

--- Quote Start ---

0xFD

0xDD

--- Quote End ---

(the DD should be correct output)

What could cause such a problem?

Previously I've made and programmed verion with 16bit input and 8bit output and everything was in order.

How should I fix the problem?

Thanks in advance for any tips.