Which E-sys Software to Use in VXDIAG BMW HDD?

Problem:

Got the VXDIAG VCX SE BMW scanner with 2025.09 ista software. Failed to start BMW E-sys software. It says unable to communicate with server component. Any idea? vxdiag-bmw-esys-unable-to-communicate-with-server-component-1

Solution:

There are several versions of E-SYS on the hard drive, but only one version can be used for free.

Only E-sys 3.40.0 can be used for free.

vxdiag-bmw-esys-unable-to-communicate-with-server-component-2

The other versions (E-sys 3.7.0, E-sysPlus4 etc) require payment for activation before using.

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