Module 'acad/ACAD' is unavailable for use with this FME edition (after upgradet 2024.2 to 2025.0

Please try re-installing FME 2025.0 on your computer. FME and AutoCAD Map 3D share some DLLs that may have been deleted when AutoCAD was uninstalled. Reinstalling FME should fix this! If you continue to have this issue, please submit a support case for us to look into further :)

Hi Evie, Actually I know if I re-install 2025.0 fix the Acad.dll problem. During send the topic I was suspect vhy I got that message. For reason I wrote the on my message a note about uninstall Autocad. But i couldn't think FME used Autocad DLL’s ( is another product). So now I am afraid some different problems about new verison Of FME. Reason allready I am working on a project which must be delivered in short time. After delivery project of course i will do it.

Thank you interested.

Hi ​@omerseyfettin interesting. Could you provide your whole log file and attach it to this thread? I’m wondering if there is anything else going on. happy to help :)

Hi again ​@evieatsafe already i deleted the log file. Delivered Project sample part waiting comments from owner, so i will send finished log file next time.

Dear ​@evieatsafe 

To day i accepted your recomment and reinsall 2025.0 verison. So i got again same error which i wrote before as “Module 'acad/ACAD' is unavailable for use with this FME edition”. After that i tried update which allready use Microstation V8 type reader. I got two error message as attached picture. Both of files already in the C:\Program Files\FME\Plugins folder. So i attached the log file with pictures. Please check it.

Hi ​@omerseyfettin,

From the information in the log file, it appears the ACAD module is not fully loading. I also noticed that FME is not able to add the the System PATH due to its length, which may interfere with loading DLLs.

Please remove all the existing FME and Autodesk related paths from the System PATH, and any others that you can do without. With the smaller PATH, FME will be able to add its required folders temporarily to the beginning, ensuring it has access to all its DLLs.

FME asks me to add the file path during installation but cannot. Therefore, I added it manually. However, since the path length exceeds 2047 characters, it causes problems while working. Even after giving this message, version 2022.2 finds acad.dll. You can find the 2022.2 log and path screenshot in the attachment. (Although I wrote a similar message yesterday, it was not displayed in the forum.)

Wy my posts are not directly shown on forum ? Why you need moderator check ?

Sorry about that. It’s an automatic spam filter that should - so we are told - become better at its job as it learns more about our community. We’ve only just got past a recent spam epidemic, so I’m reluctant to turn it off. 

omerseyfettin wrote:

FME asks me to add the file path during installation but cannot. Therefore, I added it manually. However, since the path length exceeds 2047 characters, it causes problems while working. Even after giving this message, version 2022.2 finds acad.dll. You can find the 2022.2 log and path screenshot in the attachment. (Although I wrote a similar message yesterday, it was not displayed in the forum.)

 

Dear ​@daveatsafe  I'm still waiting for your comment on my last message. Do you have any other ideas other than reinstalling version 2025.0?

Dear ​@daveatsafe I understand what you mean. FME cannot add more than 2047 characters to the path. However, the same problem exists in 2024.2.3, although it says it cannot find acad.dll at first, but then it searches and finds it and works. You can see this information in the log file I sent. I manually added it to the top of the path as a test. If the algorithm that adds the path in FME checks the length and skips it if it is more than 2047 characters, this algorithm needs to be reviewed. Because paths generally consist of lines that programs automatically add during installation, and deleting any of them may prevent another program or tool from working. Therefore, instead of the path shortening suggestion, I think it would be more appropriate for code writers to edit the path variable of FME.

Dear ​@daveatsafe finaly, i deleted the fme path from enviroments. Later I shortened the path and reinstall 2025.0 now it working normaly. However, instead of solving this problem in this way, FME can be coded to read a longer path. I would like you to note this as well. Thanks for your support