project raised exception class EAccessViolation with message 'Access Violation
at address 0049e7d6 in module 'dightsale.exe' . read of address 00000000.'
在帮助里面我查到了这些东西,找到了错误,但是我不知道怎么解决这个错误,
EAccessViolation is raised when an application
•Dereferences a nil pointer. •Writes to a code page. •Attempts to access a memory address for which there is no virtual memory allocated to the application.