PEM_write_X509 - access violation

[Alexey S. Poluntchenko]

code:   // prepare x509 content   FILE *fp = fopen("test.cer", "wbr+"); // not null   PEM_write_X509(fp, x509); // <- access violation (i'm using win2k pro)   fclose(fp);   could any body tell me the reason?   thanks wbr