Hello, here is some logs related to this issue. I filtered with "linphone"
Time
Device Name
Type
PID
Tag
Message
01-01 20:09:40.890
unknown SoftwinerEvb
Debug
29074
Mono
Could not find 'ms_set_jvm_from_envA' due to 'Symbol not found: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1//mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone" not found'.
01-01 20:09:40.890
unknown SoftwinerEvb
Debug
29074
Mono
Could not find 'ms_set_jvm_from_envA' due to 'Symbol not found: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1//mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone" not found'.
01-01 20:09:40.890
unknown SoftwinerEvb
Debug
29074
Mono
Could not find 'ms_set_jvm_from_env' due to 'Symbol not found: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1//mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone" not found'.
01-01 20:09:40.880
unknown SoftwinerEvb
Debug
29074
Mono
Could not find 'ms_set_jvm_from_env' due to 'Symbol not found: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1//mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone" not found'.
01-01 20:09:40.880
unknown SoftwinerEvb
Debug
29074
Mono
DllImport searching in: 'linphone' ('/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone.so').
01-01 20:09:39.320
unknown SoftwinerEvb
Debug
29074
Mono
DllImport searching in: 'linphone' ('/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone.so').
01-01 20:09:39.320
unknown SoftwinerEvb
Debug
29074
Mono
Could not find 'ms_set_jvm_from_envA' due to 'Symbol not found: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1//mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone" not found'.
01-01 20:09:39.320
unknown SoftwinerEvb
Debug
29074
Mono
Could not find 'ms_set_jvm_from_envA' due to 'Symbol not found: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1//mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone" not found'.
01-01 20:09:39.320
unknown SoftwinerEvb
Debug
29074
Mono
Could not find 'ms_set_jvm_from_env' due to 'Symbol not found: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1//mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone" not found'.
01-01 20:09:39.320
unknown SoftwinerEvb
Debug
29074
Mono
Could not find 'ms_set_jvm_from_env' due to 'Symbol not found: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1//mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone" not found'.
01-01 20:09:39.310
unknown SoftwinerEvb
Debug
29074
Mono
DllImport searching in: 'linphone' ('/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone.so').
01-01 20:09:39.310
unknown SoftwinerEvb
Debug
29074
Mono
DllImport loaded library '/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone.so'.
01-01 20:09:39.310
unknown SoftwinerEvb
Debug
29074
Mono
DllImport error loading library '/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone': 'Cannot load library: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1//mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/liblinphone" not found'.
01-01 20:09:39.310
unknown SoftwinerEvb
Debug
29074
Mono
DllImport attempting to load: 'linphone'.
01-01 20:09:36.540
unknown SoftwinerEvb
Debug
29074
dalvikvm
Added shared lib /data/app-lib/com.tekwavesolutions.tes-1/liblinphone.so 0x40f80538
01-01 20:09:36.470
unknown SoftwinerEvb
Debug
29074
dalvikvm
Trying to load lib /data/app-lib/com.tekwavesolutions.tes-1/liblinphone.so 0x40f80538
01-01 20:09:21.960
unknown SoftwinerEvb
Debug
29074
Mono
Assembly Ref addref Liblinphone[0x5a527418] -> Mono.Android[0x646a8190]: 3
01-01 20:09:21.960
unknown SoftwinerEvb
Debug
29074
Mono
Assembly Ref addref Liblinphone[0x5a527418] -> mscorlib[0x59f30b68]: 14
01-01 20:09:19.200
unknown SoftwinerEvb
Debug
29074
Mono
Config attempting to parse: '/Users/builder/jenkins/workspace/xamarin-android-d15-8/xamarin-android/external/mono/sdks/out/android-armeabi-v7a-release/etc/mono/assemblies/Liblinphone/Liblinphone.config'.
01-01 20:09:19.200
unknown SoftwinerEvb
Debug
29074
Mono
Config attempting to parse: '/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/Liblinphone.dll.config'.
01-01 20:09:19.200
unknown SoftwinerEvb
Debug
29074
Mono
Assembly Loader loaded assembly from location: '/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/Liblinphone.dll'.
01-01 20:09:19.200
unknown SoftwinerEvb
Debug
29074
Mono
AOT: image '/Users/builder/jenkins/workspace/xamarin-android-d15-8/xamarin-android/external/mono/sdks/out/android-armeabi-v7a-release/lib/mono/aot-cache/arm/Liblinphone.dll.so' not found: Cannot load library: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1/libaot-Liblinphone.dll.so" not found
01-01 20:09:19.190
unknown SoftwinerEvb
Debug
29074
Mono
AOT: image '/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/Liblinphone.dll.so' not found: Cannot load library: load_library(linker.cpp:745): library "/data/app-lib/com.tekwavesolutions.tes-1/libaot-Liblinphone.dll.so" not found
01-01 20:09:19.190
unknown SoftwinerEvb
Debug
29074
Mono
Assembly Liblinphone[0x5a527418] added to domain RootDomain, ref_count=1
01-01 20:09:19.190
unknown SoftwinerEvb
Debug
29074
Mono
Prepared to set up assembly 'Liblinphone' (/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/Liblinphone.dll)
01-01 20:09:19.190
unknown SoftwinerEvb
Debug
29074
Mono
Image addref Liblinphone[0x5a527418] -> /mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/Liblinphone.dll[0x5a5265d0]: 2
01-01 20:09:19.190
unknown SoftwinerEvb
Debug
29074
Mono
Assembly Loader probing location: '/mnt/sdcard/Android/data/com.tekwavesolutions.tes/files/.__override__/Liblinphone.dll'.
From: Wessel Oosthuizen
Sent: Thursday, September 20, 2018 9:08 AM
To: linphone-***@nongnu.org
Subject: Xamarin / System.EntryPointNotFoundException
Hello,
I am having the same issue as in this thread.
https://lists.nongnu.org/archive/html/linphone-developers/2017-06/msg00030.html
I am trying to deploy this to an Android 4.2 device, but getting the error
System.EntryPointNotFoundException: ms_set_jvm_from_env
Your sample Xamarin application has the same behavior.
It works fine on my phone, android 8...
Any advice?
Thanks
Wessel Oosthuizen