From 186ac827c85504c62e96d86bd990ea5208a8f99c Mon Sep 17 00:00:00 2001
From: Christopher Bruns <cmbruns@rotatingpenguin.com>
Date: Sat, 28 Mar 2020 07:51:18 -0700
Subject: [PATCH] Use better error message when interface check fails (fixes
 issue #74)

---
 src/translate/generator.py | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/translate/generator.py b/src/translate/generator.py
index 8b3ab95..ca3b90a 100644
--- a/src/translate/generator.py
+++ b/src/translate/generator.py
@@ -286,13 +286,18 @@ def __str__(self):
             # Expose functions #
             ####################
             
-            def _checkInitError(error):
+            def _checkInterfaceVersion(version_key):
                 """
                 Replace openvr error return code with a python exception
                 """
-                if error != VRInitError_None:
-                    shutdown()
-                    raise OpenVRError("%s (error number %d)" % (getVRInitErrorAsSymbol(error), error))
+                if isInterfaceVersionValid(version_key):
+                    return
+                shutdown()
+                error = VRInitError_Init_InterfaceNotFound
+                msg = f"The installed SteamVR runtime could not provide API version {version_key} requested by pyopenvr. "\\
+                      f"You may need to update SteamVR or use an older version of pyopenvr. "\\
+                      f"{getVRInitErrorAsSymbol(error)} (error number {error})."
+                raise OpenVRError(msg)
             
             
             # Copying VR_Init inline implementation from https://github.com/ValveSoftware/openvr/blob/master/headers/openvr.h