Error code?

[St-Pierre Philip]

Title: Error code?

Hi,
        I wrote the following lines:

if (RAND_bytes((unsigned char *)ret, sizeof(DES_cblock)) != 1)
{
        errCode = ERR_get_error();
        ERR_error_string(errCode, errString);
        printf("RAND_bytes Error: %s\n", errString);

And here is what i get from the printf:

RAND_bytes Error: error:24064064:lib(36):func(100):reason(100)

How can i get the textual reason of the Error??

Thanks!!

Phil