Getting AV error when OCI Array Buffer Size is set to a high value as 9999:
Access violation at address 0000000009AC4DC7 in module 'Toad.exe'. Write of address 0000000000000000
WORKAROUND
Go to View | Toad options | Oracle | General and set the OCI Array Buffer Size to automatic
Note that it is recommended to use the Automatic option.
An high OCI value means allocating a lot of lots of memory for each fetch, even if only one row comes back.
STATUS
Waiting for fix in a future release of Toad for Oracle