(CC) Save all Layer Masks as Alpha Channels

Any such script would fail with a error once it tried to exceed Photoshop 53 Alpha Channel limit.  If a document had 53 alpha channels to begin with the script would fail saving the first alpha channel it would try to save.  I know this for a have a script that tries to create my kind of collage template PSD files that has no Image layers but has alpha channels to map the locations where images will be populated.  I had to program the script to catch that there were more the 53 prototype image layers.

IMO with the exception of the background layer all layers have Alpha Channel its actual pixel map. This invisible Alpha channel maps the layers actual pixels locations and is used in conjunction with any enable layer masks when pixels are rendered for the layer.  What I was trying to do was to create a collage template that had Alpha channel to map the locations of where Image would be placed. . I would open a document the size and resolution I wanted the collage to have. Then add an empty layer the use a selection tool to make a 4"x6" selection and fill with pixels..  Duplcate that layer for as many image I wanted. And I would position the layer where I want the image to be located.  I would then  run the script.  It would save Alpha channels for each image location and at the end flatten the layer image prototype stack to stamp the image locations onto the required background layer.  Once I reached 54 image layers  the script failed and I realized that my Collage Scripts and templates were limited to a maximum of 53 images.

We will be merging all of the layers containing the masks. When all these layers are merged into one, all of the layer mask will be gone. I'd like to keep those layer mask selections as alpha channels so I can still use them. Since the layers are in different groups, finding the selection I'm looking for is a painful process. If they were all in the channels panel, it would be much simpler to quickly get the selection I'm looking for.

I don't think we'd run over 53 mask....doing this process manually for some time now and I've never hit the limit. In the event I do hit the limit and the script failed, I would do that image manually. I'd actually prefer to do it manually if this happend so I can choose the more important selections to keep and get rid of the ones I don't think I'd need to use.

Thanks for your feedback, your help is greatlty appreciated.