DavMail can't find suitable Java version under Win 10

[Jonathan Gilligan]

I have Zulu JRE FX installed and it's on my path, but DavMail can't find it.

C:>java -version
openjdk version "13.0.3" 2020-04-14
OpenJDK Runtime Environment Zulu13.31+11-CA (build 13.0.3+3-MTS)
OpenJDK 64-Bit Server VM Zulu13.31+11-CA (build 13.0.3+3-MTS, mixed mode, sharing)

C:>which java
/c/Program Files/Java/zulu13.31.11-ca-fx-jre13.0.3-win_x64/bin/java

But when I install DavMail 64-bit and try to launch it, I get the error dialog, "A suitable version of Java could not be found on your system"

I also tried installing the Oracle JRE release

C:>java -version
java version "1.8.0_251"
Java(TM) SE Runtime Environment (build 1.8.0_251-b08)
Java HotSpot(TM) Client VM (build 25.251-b08, mixed mode, sharing)

C:>which java
/c/Program Files (x86)/Common Files/Oracle/Java/javapath/java

And I get the same error from DavMail.

I'm running Windows 10 Education, version 1809, on a Core i7 machine with 16 GB RAM.

[Jonathan Gilligan]

I solved the problem following the advice here: https://sourceforge.net/p/davmail/discussion/644057/thread/e07e7d1836/#ec6b

1. Download the DavMail repository from GitHub (clone it or download as a ZIP file and unzip it)
2. Go to the src/winrun4j directory
3. Edit the .ini files (e.g., davmail64.ini) and add the following line:

vm.location=/Program Files/Java/zulu13.31.11-ca-fx-jre13.0.3-win_x64/bin/server/jvm.dll

using the path to thejvm.dllof your Java installation
4. Run

rcedit64.exe /C davmail64.exe
rcedit64.exe /I davmail64.exe davmail.ico
rcedit64.exe /N davmail64.exe davmail64.ini

and repeat similarly for the other .exe files, such as davmailservice64.exe (use rcedit.exe for the 32-bit versions and rcedit64.exe for the 64-bit versions)
5. Copy the updated executable files to the installation directory (c:\program files\DavMail).

[SteveM]

I found that simply installing the 32bit version of Davmail works fine, but the 64bit version can't find Java installed (even though I have a 64bit version of java jvm installed). Hope that helps someone - it was simple enough just to install Davmail as 32bit and given the functionality of the utility, I can't see how it makes much difference either way.

[Marc Elser]

Installing 32bit version solved the issue also for me. To be honest updating the files with rcedit64.exe is just not suitable and I don't get why davmail just can't get this issue sorted out once and for all. It's been there for years actually and still 64-bit win version is failing to detect proper jvm. I guess they just don't care

[Valdis Vitolins]

For me worked installation of Oracle 8 32-bit JDK and DavMail 32-bit version.

[Carter Persall]

What I found that worked is to install DavMail, then open the executables in a text editor and search for 'vm.location=' and replace the following path with the path to my jvm.dll. The alternative method would be to place a portable JDK into a folder named 'JVM' as that's where it looks by default.