Saving to DDS lost alpha channel

[obra512]

Trying upscale DDS texture with trensparency. On preview all ok. When saving to PNG - all ok. But when save to DDS alpha is absent (got black).

[RocketRobz]

Did you turn on the transparency feature?

[obra512]

Yes. In preview and saving png it works.

[azumukupoe]

I set output format to "same as source" and got the following message Cupscale does not support the image format for exporting, so PNG is used.

[NXTler]

Same here