decrypter error message explanation

[Yannis]

While decrypting a dvd I got this message; After I clicked "retry" it proceeded normally.

--------------
I/O Error!
Device: [snip]
SCSIStatus: 0x02
Interpretation: check condition

CDB: [snip]
Interpretation: Send Key

Sense Area: [snip]
Interpretation: Invalid Field in Parameter List
--------------

1) Anybody knows what exactly this error means?

2) After my retry is there a chance that the file (VTS_04_1.VOB) is incorrect?

Thank you in advance

PS the log is:

[snip]
I 15:17:58 Fast Error Skip: Yes - Read Error Retries: 9
I 15:17:58 Merge VOB Files: No
I 15:17:58 Stream Processing: No
I 15:17:58 Multi Angle Processing: No
I 15:17:58 Detect Mastering Errors: Yes
I 15:17:58 Remove Macrovision Protection: Yes
[snip]
I 18:19:42 Decrypting VTS_04_1.VOB... (LBA: 2853876 - KEY: C0 3A 52 0E 3B)
I 18:19:42 Found VOB ID: 1 - CELL ID: 1 - LBA: 0 - KEY: C0 3A 52 0E 3B
I 18:21:22 Found VOB ID: 1 - CELL ID: 2 - LBA: 139792 - KEY: C0 3A 52 0E 3B
I 18:22:19 Found VOB ID: 1 - CELL ID: 3 - LBA: 218173 - KEY: C0 3A 52 0E 3B
I 18:24:19 Found VOB ID: 1 - CELL ID: 4 - LBA: 385935 - KEY: C0 3A 52 0E 3B
I 18:25:03 Found VOB ID: 1 - CELL ID: 5 - LBA: 446336 - KEY: C0 3A 52 0E 3B
[snip]
I 18:30:42 Operation Successfully Completed! - Duration: 03:12:44
I 18:30:42 Average Read Rate: 651 KB/s (0.5x) - Maximum Read Rate: 3,321 KB/s (2.5x)

[LIGHTNING UK!]

I know what it means. Its nothing for you to worry about!
No idea why 'retry' worked, and it didnt the first time, but in any case, your file will be fine.