fix error thrown

apps/remix-ide/src/app/plugins/contractFlattener.tsx

@@ -15,23 +15,20 @@ const profile = {
 }
 
 export class ContractFlattener extends Plugin {
-  fileName: string
   constructor() {
     super(profile)
-    this.fileName = ''
   }
 
   onActivation(): void {
     this.on('solidity', 'compilationFinished', async (file, source, languageVersion, data, input, version) => {
-      await this.flattenContract(source, this.fileName, data)
+      await this.flattenContract(source, file, data)
     })  
     _paq.push(['trackEvent', 'plugin', 'activated', 'contractFlattener'])
   }
 
   async flattenAContract(action: customAction) {
-    this.fileName = action.path[0]
     this.call('manager', 'deactivatePlugin', 'solidityumlgen')
-    await this.call('solidity', 'compile', this.fileName)
+    await this.call('solidity', 'compile', action.path[0])
   }
 
   /**

apps/remix-ide/src/app/plugins/solidity-umlgen.tsx

@@ -76,7 +76,7 @@ export class SolidityUmlGen extends ViewPlugin implements ISolidityUmlGen {
       let result = ''
       try {
         if (data.sources && Object.keys(data.sources).length > 1) { // we should flatten first as there are multiple asts
-          result = await this.flattenContract(file)
+          result = await this.flattenContract(source, file, data)
         }
         const ast = result.length > 1 ? parser.parse(result) : parser.parse(source.sources[file].content)
         const umlClasses = convertAST2UmlClasses(ast, this.currentFile)
@@ -135,8 +135,8 @@ export class SolidityUmlGen extends ViewPlugin implements ISolidityUmlGen {
    * and assigns to a local property
    * @returns {Promise<string>}
    */
-  async flattenContract (filePath: string) {
-    const result = await this.call('contractflattener', 'flatten', filePath)
+  async flattenContract (source: any, filePath: string, data: any) {
+    const result = await this.call('contractflattener', 'flattenContract', source, filePath, data)
     return result
   }
 

libs/remix-ui/solidity-compiler/src/lib/logic/flattenerUtilities.ts

@@ -170,6 +170,7 @@ function _resolvePathArray(parts) {
 }
 
 export function normalizeContractPath(contractPath: string): string {
+		console.log('contractPath', contractPath)
     let paths = contractPath.split('/')
     let filename = paths[paths.length - 1].split('.')[0]
     let folders = ''