What does it mean to say "Access violation at address"?

if there is a problem
I will sometimes find
Access violation at address 1000DF0D in module "SFmpq.dll". when I open the file. What is the meaning of the passage Read of address 3BDEDD0C.
? Is it a problem with the program or the file itself? Or is it a problem with computer equipment?
since only some files can be opened in this way, what kind of problem is this?

CPP
Mar.23,2021

this is a program crash, usually a program problem. Of course, there may be problems with the file itself, such as some offset data error, which has been migrated to the ends of the earth. But the program itself should not crash if it is robust enough. As for the specific problems, they are ever-changing and strange.


should be read memory out of bounds

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3cb9f-408c3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3cb9f-408c3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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