# java.lang.IllegalArgumentException: NTFS ADS separator (‘:’) in file name is forbidden.

## post by ulf.leonhardt on Nov 18, 2024

Ulf Leonhardt

[Nov 2024](https://community.sonatype.com/t/java-lang-illegalargumentexception-ntfs-ads-separator-in-file-name-is-forbidden/13874 "Post date")

Hi,

I am running Sonatype Nexus Repository OSS 3.69.0-02 on Windows.

I have set up a proxied Helm repo for the Bitnami helm charts (source [https://charts.bitnami.com/bitnami](https://charts.bitnami.com/bitnami)). This was working fine.

Starting from today (18.11.2024), I can’t download the index.yaml from Nexus anymore, I get a file of length 0. In the log I see a message “java.lang.IllegalArgumentException: NTFS ADS separator (‘:’) in file name is forbidden.”

Has anybody else seen this problem? Is there a workaround?

Many thanks

Ulf

## post by mpiggott on Nov 19, 2024

Matthew Piggott

mpiggott

[Sonatypers](https://community.sonatype.com/g/sonatype-employees)

[Nov 2024](https://community.sonatype.com/t/java-lang-illegalargumentexception-ntfs-ads-separator-in-file-name-is-forbidden/13874/2 "Post date")

This may be a bug, I’d suggest checking [Issues · sonatype/nexus-public · GitHub](https://github.com/sonatype/nexus-public/issues)