[SOLVED] Error in Questasim simulation

[dharag]

Hello,

I am using Questasim for verification of VHDL and SV files. In generator class run task I am giving the input from a .DAT file and I am facing an error for the same. Error is

"Error: (vsim PLI-3084) : $fscanf: Argument 1 is not a valid file descriptor"

Code is:
int i;
int D;
i = $fscanf(fp,"%d",D);

file pointer fp is passed through environment class run task.

Please help me to come out of this error :thinker:
Thanks in advance

 

[dave_59]

What is the declaration and value of fp?

 

[dharag]

Hello,

fp is the file pointer in the environment class run task

int fp;
fp = $fopen("file_for_input.dat","r");

this fp is passed to genereator run task and when I am displaying value of fp in generator block it displays 0.

 

[dave_59]

So either $fopen failed, or you are not passing fp correctly to the generator run task.
Did you check the value of fp right after you opened the file?

 

[rahul.achates]

make sure you have open file before using it.

can you copy paste total code here ..

 

[dharag]

Thanks Dave Rich for your response, I have solved the same and you were right my file was not being opened due to some directory issues. Now its working fine...

- - - Updated - - -

Also Thanks Rahul for your suggestion, my code is now running perfectly

 

[dave_59]

BTW, if $fopen returns 0, you can use $ferror(fp,str) to get a string message about why the open failed.