Unable to load DLL 'Microsoft.Quantum.Simulator.Runtime.dll'

Question

Getting Unable to load DLL \'Microsoft.Quantum.Simulator.Runtime.dll\' error while trying to validate my Q# environment by running the teleport sample program.

Answer 1

The Simulator is only tested/supported in Windows 10. I would highly recommend upgrading your system.

Answer 2

Under Ubuntu bionic, I had to install libgomp1 because Microsoft.Quantum.Simulator.Runtime.dll depends on libgomp.so.1.

sudo apt install libgomp1

The dependency can be seen here.

ldd -r ~/.nuget/packages/microsoft.quantum.development.kit/0.2.1802.2202-preview/runtimes/linux-x64/native/Microsoft.Quantum.Simulator.Runtime.dll

linux-vdso.so.1 (0x00007ffcbb4f4000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fd537237000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fd536e99000)
libgomp.so.1 => not found
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fd536aa8000)
/lib64/ld-linux-x86-64.so.2 (0x00007fd537832000)

Answer 3

copy the Microsoft.Quantum.Simulator.Runtime.dll from C:\Users\{user}\.nuget\packages\microsoft.quantum.development.kit\0.2.1802.2202-preview\runtimes\win10-x64 to C:\Users\{user}\.nuget\packages\microsoft.quantum.development.kit\0.2.1802.2202-preview\lib\netstandard2.0. Although I have not tested this with the older Microsoft Quantum Development Kit version, there seems to be problem with the 0.2.1802.2202 version. Make sure to check if AVX is avaialble, you can use CPU-Z tool to check that in instructions section.

then run dotnet run which should result in the

Round 0:        Sent False,     got False.
Teleportation successful!!

Round 1:        Sent True,      got True.
Teleportation successful!!

Round 2:        Sent False,     got False.
Teleportation successful!!

Round 3:        Sent False,     got False.
Teleportation successful!!

Round 4:        Sent False,     got False.
Teleportation successful!!

Round 5:        Sent False,     got False.
Teleportation successful!!

Round 6:        Sent False,     got False.
Teleportation successful!!

Round 7:        Sent True,      got True.
Teleportation successful!!



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