rpncomp fails on .import on Windows System

[mjakuipers]

A short RPN program will compile correctly. When adding a .import 41CX (actually all modexport files fail). Using a non-existing .modexport file gives another error. Issue seen under Windows 10, rpncomp is run is a CMD window.

RPN file: 
; test program for failing .import
.import 41CX
 01  LBL "TEST"
 02  END

Command line and error message:

C:\Users\mkuipers\Documents\Development\CalypsiNut\example\Mein>rpncomp -l test.rpn

fatal error: unsupported protocol in URI "C:\\Program Files (x86)\\Calypsi-nut\\module-export\\41CX.modexport"

fatal error: document unpickling failed
no more contents to be read
context:    element "/"
attributes:  status="3" module="getContentsFromDoc" transfer-URI="C:/Program%20Files%20(x86)...
cannot parse XROM export file "C:\Program Files (x86)\Calypsi-nut\module-export\41CX.modexport"
Terminating due to errors