[ISO9660] "Error reading file: The filename, directory name, or volume label syntax is incorrect." extracting filesystem from image using Amiga CD encoding

claunia commented

2026-01-29 15:28:12 +00:00

Owner

Originally created by @TheRogueArchivist on GitHub (Jun 5, 2021).

Prerequisites

Are you running the latest version?
Can you reproduce the problem in the debug version?

Check and fill as appropriate:

I was running Aaru under Windows 10...
I was running Aaru under Linux [version here]...
I was running Aaru under macOS [version here]...
...in 32-bit
...in 64-bit
...using an Intel / AMD processor
...using an ARM or Apple Silicon processor
- Image format: Multiple
- Application that created the image: Aaru
I was converting the image...
- ...Destination image format:
I was listing the filesystem contents...
I was extracting the filesystem contents...
- ...Filesystem: ISO9660
- Analyze command recognizes the filesystem
I was creating a metadata sidecar
I was checksumming the image
I was verifying the image

Description

When extracting the filesystem from a CD image created for the Amiga CD, Aaru mid-extraction stops with the error "Error reading file: The filename, directory name, or volume label syntax is incorrect.". When viewing the ISO through archive.org, it seems to render the text correctly. Example of how the folder name appears in Windows Explorer:

Exact command line used:

aaru fs extract .\NetworkCD.aaruf 0

Output of command execution with debug output enabled

https://pastebin.com/u5QkN62w

Image

https://archive.org/details/simple-networking-tools-for-amiga-cd-weird-science-1994

Originally created by @TheRogueArchivist on GitHub (Jun 5, 2021). ### Prerequisites * [ ] Are you running the latest version? * [ ] Can you reproduce the problem in the debug version? ### Check and fill as appropriate: * [X] I was running Aaru under Windows 10... * [ ] I was running Aaru under Linux [version here]... * [ ] I was running Aaru under macOS [version here]... * [ ] ...in 32-bit * [X] ...in 64-bit * [X] ...using an Intel / AMD processor * [ ] ...using an ARM or Apple Silicon processor * **Image format**: Multiple * **Application that created the image**: Aaru * [ ] I was converting the image... * ...**Destination image format**: * [ ] I was listing the filesystem contents... * [X] I was extracting the filesystem contents... * ...**Filesystem**: ISO9660 * [X] Analyze command recognizes the filesystem * [ ] I was creating a metadata sidecar * [ ] I was checksumming the image * [ ] I was verifying the image ### Description  When extracting the filesystem from a CD image created for the Amiga CD, Aaru mid-extraction stops with the error "Error reading file: The filename, directory name, or volume label syntax is incorrect.". When viewing the ISO through archive.org, it seems to render the text correctly. Example of how the folder name appears in Windows Explorer: ![explorer_hyJVmDB36E](https://user-images.githubusercontent.com/24215969/120878070-49827a80-c577-11eb-9a45-d0d2feacbf53.png) ### Exact command line used: `aaru fs extract .\NetworkCD.aaruf 0` ### Output of command execution with debug output enabled https://pastebin.com/u5QkN62w ### Image   https://archive.org/details/simple-networking-tools-for-amiga-cd-weird-science-1994

claunia added the wontfix invalid labels 2026-01-29 15:28:12 +00:00

claunia closed this issue

2026-01-29 15:28:13 +00:00

claunia commented

2026-01-29 15:28:15 +00:00

Author

Owner

@claunia commented on GitHub (Jun 5, 2021):

That's not a correct ISO name.

The folder is named "ESPAÑOL" with bytes 0x45 0x53 0x50 0x41 0xD1 0x4F 0x4C that corresponds to Windows-1252 codepage that violates the ISO9660 standard.

When there's not a Joliet extension the codepage used is ASCII where the byte 0xD1 is not defined and therefore gets converted to ? a character not supported in Windows for filenames.

You should set up the namespace as Romeo, then it will work (default codepage for Romeo is Windows-1252 so you don't need to specify it.)

@claunia commented on GitHub (Jun 5, 2021): That's not a correct ISO name. The folder is named "ESPAÑOL" with bytes 0x45 0x53 0x50 0x41 0xD1 0x4F 0x4C that corresponds to Windows-1252 codepage that violates the ISO9660 standard. When there's not a Joliet extension the codepage used is ASCII where the byte 0xD1 is not defined and therefore gets converted to ? a character not supported in Windows for filenames. You should set up the namespace as Romeo, then it will work (default codepage for Romeo is Windows-1252 so you don't need to specify it.)

claunia referenced this issue

2026-01-29 15:42:16 +00:00

[PR #743] [MERGED] Cosmetic fix in Info.cs - adding periods to sentences #1137

claunia referenced this issue

2026-01-29 15:42:21 +00:00

[PR #743] Cosmetic fix in Info.cs - adding periods to sentences #1142