Help-dgrealloc,_sqinitdiag() problems

Hi, Is any one out there who got memory allocation problems with _sqinitdiag() or dgrealloc() functions? If so, how did you resolve it? Please do send me a email. I am getting segmentation fault at the line "exec sql database dbname" I have tried the database with dbaccess and it does work. I tried to debug using dbx debugger for the core dump and it shows segmentation at _sqinitdiag(). I have not been able to resolve it. So, any suggestions will be helpful. Thanks in advance. Shyama.