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我们的一套进销存的软件，出现EAccessViolation错误。
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.
唉，还是经验不够，请大家帮一下忙。
那么复杂～～，帮你up
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