Can't write cubes to memory stream

[tnatt]

The error below 👇 is raised in xtgeo when trying to write cubes to memory stream.

https://github.com/equinor/xtgeo/blob/2a144ec2123b192944591914adc7b4b654db5f16/src/xtgeo/io/_file.py#L304-L306

A solution would be to wrap the check_folder function in Cube.to_file() with an if not fobj.memstream like done for grids, or to stop raising an ValueError and instead return out of the function.

https://github.com/equinor/xtgeo/blob/2a144ec2123b192944591914adc7b4b654db5f16/src/xtgeo/cube/cube1.py#L871-L873

https://github.com/equinor/xtgeo/blob/2a144ec2123b192944591914adc7b4b654db5f16/src/xtgeo/grid3d/grid.py#L712-L715

[jcrivenaes]

... , or to stop raising an ValueError and instead return out of the function.

Agree that this is a better solution

Another problem is that support for memory stream for SEGY files must be enabled

[jcrivenaes]

Thin I will close this soon, as segyio currently seems not be able to support memory streams. However it would trigger a few new issues that can be solved as separate issues:

• Enable memory stream i/o for all supported formats
• Stop raising an ValueError and instead return out of the function if the check_folder is applied for memory stream.