diff --git a/developer/src/kmc-convert/src/converter-messages.ts b/developer/src/kmc-convert/src/converter-messages.ts
index 56045b4272..115315cc03 100644
--- a/developer/src/kmc-convert/src/converter-messages.ts
+++ b/developer/src/kmc-convert/src/converter-messages.ts
@@ -57,4 +57,8 @@ export class ConverterMessages {
     this.ERROR_UnsupportedCharactersDetected,
     `Input file ${def(o.inputFilename)} contains unsupported character ('${def(o.output)}') on key ( ${def(o.key)}) at keyMap index ${def(o.keymap_index)}`,
   );
+
+  static ERROR_InvalidFile = SevError | 0x0008;
+  static Error_InvalidFile = (o: { errorText: string; }) => m(
+    this.ERROR_InvalidFile, `The source file has an invalid structure: ${def(o.errorText)}`);
 }
diff --git a/developer/src/kmc-convert/src/keylayout-to-kmn/keylayout-to-kmn-converter.ts b/developer/src/kmc-convert/src/keylayout-to-kmn/keylayout-to-kmn-converter.ts
index 92bdb6a93d..4e18cbc17b 100644
--- a/developer/src/kmc-convert/src/keylayout-to-kmn/keylayout-to-kmn-converter.ts
+++ b/developer/src/kmc-convert/src/keylayout-to-kmn/keylayout-to-kmn-converter.ts
@@ -12,7 +12,9 @@ import { KmnFileWriter } from './kmn-file-writer.js';
 import { KeylayoutFileReader } from './keylayout-file-reader.js';
 import { ConverterMessages } from '../converter-messages.js';
 import { ConverterArtifacts } from "../converter-artifacts.js";
-import { ConverterToKmnArtifacts } from "../converter-artifacts.js";
+import { ConverterToKmnArtifacts } from "../converter-artifacts.js"
+import { KeylayoutXMLSourceFile } from '../../../common/web/utils/src/types/keylayout/keylayout-xml.js';
+
 
 export interface ConverterResult extends KeymanCompilerResult {
   /**