Template Export: file_stream_device iostream stream error

[franzj13859080]

I try to export a graphical template with essential graphics. New Project, I add just a color layer and add the scaling as a editable option.

When I hit export as template this appears: 

[nishu_kush]

I'm sorry to hear that. What version of After Effects are you using? Are you on macOS or Windows? Are you able to export the MOGRT to a different location or to the Creative Cloud Libraries?

Let us know.

Thanks,
Nishu

[franzj13859080]

Hi Nishu, 

I use the 25.2 (Build 131) on a Windows 10. I am not able to export anything, cause the error appears right after clicking on "Template Export" in Essential Graphics.

[Theresa Rostek]

hi @franzj13859080 ,

Do you get the same error if you save the project? Can you share the AEP if you are able to save?

Thanks,

Theresa

[Jude Lloyd_Binas1595]

Is it fixed? If yes, how did you do it. I am currently facing the same issue. 

[Jude Lloyd_Binas1595]

[JohnColombo]

Hi @Jude Lloyd_Binas1595,

Thank you for reporting this issue. We've had this reported by others as well, so I'll be merging your report into another thread related to this same issue.

Could you provide some additional details about your system and the steps you've taken:

1. What is your OS version and hardware specs (CPU, RAM, etc)
2. What version of After Effects are you currently using?
3. Do you get this same error when you attempt to save the project? Can you share the AEP if you are able to save?
4. Do you get this same error when trying to export the template while in Safe Mode?

Thank you for any additional information,

- John, After Effects Engineering Team

[franzj13859080]

No other result. I can save the project, but no template export. 

Here it is: https://we.tl/t-kKpuS7pl5o

[franzj13859080]

1. Windows 10 Home, Intel i7 8700K, 32 GB RAM, Intel UHD Graphics 630 + Geforce RTX 2070
2. 25.2.2
3. No other result. I can save the project, but no template export.
Here it is: https://we.tl/t-kKpuS7pl5o
4. Yes

[zoe_5980]

I am getting the same issue as well. Has anyone been able to solve it?

[eunchong28861383wq3a]

When exporting a motion graphics template,
the following error occurs and it is not saved.

=================================================

file_stream_device: failed to open file for writing: iostream stream error

=================================================

Even if I put in just one source text, the same error occurs.

Even if I try the latest update or migrate, it is the same.

I am not using any plugins,
and I am using the Windows version.

My computer specifications are
i9-14900K
GeForce RTX 4060

[nishu_kush]

Hi @eunchong28861383wq3a, thanks for writing in.

Others have reported this issue. I am merging your thread with another one related to the same issue. For further investigation, do you mind sharing .AEP file for testing? Feel free to share it via DM if you do not want to share it publicly.

We're here to help.

Thanks,
Nishu

[clemence313208361qy4]

Hi, I have the same exact issue ! Hope there will be a solution

[Takahiro31908473ip9j]

Yo, bro!

It seems that Adobe After Effects 2025 has a bug that prevents exporting Motion Graphics Templates (.mogrt).
Even after trying various methods such as clearing the cache and resetting preferences, I was unable to export .mogrt files using the 2025 version.

Therefore, I decided to downgrade to an older version of After Effects.

Using the Creative Cloud Desktop app, I downloaded After Effects 2024, then launched the 2025 version and saved a copy of the project in 2024.x format.
After opening that copy in After Effects 2024, I was finally able to export it as a Motion Graphics Template.

Take it easy!
Safe travels

[mm_9460]

After Effects警告: file_stream_device: failed to open file for writing: iostream stream error

[mm_9460]

我的解决方法是修改环境变量、My Computer Properties、Advanced Options Environment Variables，将 TEMP 路径更改为另一个驱动器，在另一个驱动器号中创建文档 TEMP，填写路径，修改成功并完美解决

[mm_9460]

My solution is to modify the environment variables, My Computer Properties, Advanced Options Environment Variables, change the TEMP path to another drive, create a document TEMP in the other drive letter, fill in the path, modify it successfully and solve it perfectly