https://community.intel.com/t5/Intel-Fortran-Compiler/deallocation-error/m-p/762567#M18054 There may be some situations where the Fortran run-time can't test this (for example, if you have two pointers to the same or overlapping storage and deallocate both of them.) If you think your program is correct, please send a test case to Intel Premier Support. Mon, 23 Jan 2006 22:42:36 GMT Steven_L_Intel1 2006-01-23T22:42:36Z https://community.intel.com/t5/Intel-Fortran-Compiler/deallocation-error/m-p/762566#M18053 Hi, <BR />I've got some code in which I used derived type array pointers. At the end I deallocate them and get the following message, <BR /><BR />*** glibc detected *** double free or corruption (top): 0x08249b38 ***<BR />forrtl: error (76): IOT trap signal<BR /><BR />Now I'm assuming this means that the array is not allocated already but I was wondering why I get this error message rather than the usual "array not allocated" message from the fortran run time?<BR /><BR />Also, does anyone have any hints on debugging these types of errors?<BR /><BR />thanks<BR />Jeremy Mon, 23 Jan 2006 22:17:28 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/deallocation-error/m-p/762566#M18053 jft27 2006-01-23T22:17:28Z https://community.intel.com/t5/Intel-Fortran-Compiler/deallocation-error/m-p/762567#M18054 There may be some situations where the Fortran run-time can't test this (for example, if you have two pointers to the same or overlapping storage and deallocate both of them.) If you think your program is correct, please send a test case to Intel Premier Support. Mon, 23 Jan 2006 22:42:36 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/deallocation-error/m-p/762567#M18054 Steven_L_Intel1 2006-01-23T22:42:36Z