[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Info]: Pinging SQL server to keep connection alive...
[Info]: Pinging SQL server to keep connection alive...
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
[Error]: --- nullpo info --------------------------------------------
[Error]: D:\Ragnarok Offline Pack 2020 (hercules)\01_emulator\01_emulator\hercules_PRERE\src\map\pet.c:1018: 'pd->bl.prev' in function `unknown'
[Error]: --- end nullpo info ----------------------------------------
Please can someone explain to me why this errors appear?.
I've already searched the wiki about it but with no possible solutions.