When there is one additional Image to mirror but theb it failed and no image was mirrored, so the step to prepare the tar ball should be skipped.
    

     [cloud-user@preserve-oc-mirror-vm knarra]$ ./oc-mirror version
W0205 06:11:10.048141    3628 mirror.go:102] 

⚠️  oc-mirror v1 is deprecated (starting in 4.18 release) and will be removed in a future release - please migrate to oc-mirror --v2

WARNING: This version information is deprecated and will be replaced with the output from --short. Use --output=yaml|json to get the full version.
Client Version: version.Info{Major:"", Minor:"", GitVersion:"v0.2.0-alpha.1-351-ga86dc98", GitCommit:"a86dc982", GitTreeState:"clean", BuildDate:"2025-02-04T16:45:48Z", GoVersion:"go1.23.4", Compiler:"gc", Platform:"linux/amd64"}

    

    Always
    

    1. Use the ImageSetConfig as shown below
    2. Run command mirror2disk `oc-mirror -c /tmp/isc.yaml file://test --v2`
    3.
    

    2025/02/05 06:13:44  [INFO]   : 👋 Hello, welcome to oc-mirror
2025/02/05 06:13:44  [INFO]   : ⚙️  setting up the environment for you...
2025/02/05 06:13:44  [INFO]   : 🔀 workflow mode: mirrorToDisk 
2025/02/05 06:13:44  [INFO]   : 🕵  going to discover the necessary images...
2025/02/05 06:13:44  [INFO]   : 🔍 collecting release images...
2025/02/05 06:13:44  [INFO]   : 🔍 collecting operator images...
 ✗   (2s) Collecting catalog registry.redhat.io/redhat/redhat-operator-index:v4.20 
2025/02/05 06:13:46  [WARN]   : [OperatorImageCollector] catalog reading manifest v4.20 in registry.redhat.io/redhat/redhat-operator-index: manifest unknown : SKIPPING
2025/02/05 06:13:46  [INFO]   : 🔍 collecting additional images...
2025/02/05 06:13:46  [INFO]   : 🔍 collecting helm images...
2025/02/05 06:13:46  [INFO]   : 🔂 rebuilding catalogs
2025/02/05 06:13:46  [INFO]   : 🚀 Start copying the images...
1 / 1 (0s) [===========================================================================================================================================================================================================================] 100 %
 ✗   (0s) ubi:latest ➡️  cache 
2025/02/05 06:13:47  [INFO]   : === Results ===
2025/02/05 06:13:47  [INFO]   :  ✗  0 / 1 additional images mirrored: Some additional images failed to be mirrored - please check the logs
2025/02/05 06:13:47  [ERROR]  : [Worker] error mirroring image registry.redhat.io/ubi10/ubi:latest error: initializing source docker://registry.redhat.io/ubi10/ubi:latest: reading manifest latest in registry.redhat.io/ubi10/ubi: unauthorized: access to the requested resource is not authorized
2025/02/05 06:13:47  [INFO]   : 📦 Preparing the tarball archive...
2025/02/05 06:13:47  [INFO]   : 👋 Goodbye, thank you for using oc-mirror
2025/02/05 06:13:47  [ERROR]  : unable to add cache repositories to the archive : lstat /home/cloud-user/.oc-mirror/.cache/docker/registry/v2/repositories: no such file or directory 

    

     step to prepare tarball should be skipped
    

   [cloud-user@preserve-oc-mirror-vm knarra]$ cat /tmp/isc_cachedir.yaml 
kind: ImageSetConfiguration
apiVersion: mirror.openshift.io/v2alpha1
mirror:
  platform:
   channels:
   - name: stable-4.18
     minVersion: 4.18.1
     maxVersion: 4.18.1
  operators:
    - catalog: registry.redhat.io/redhat/redhat-operator-index:v4.20
      packages:
       - name: external-dns-operator
  additionalImages:
  - name: registry.redhat.io/ubi10/ubi:latest