While testing out a file attachment process in a workflow, a "Internet Explorer cannot display the webpage" message appeared when executing the portion of a Workflow using the 'InputFileComponent'. It was very unusual. There were no other messages, and debug logging failed to expose more information. What was discovered however, upon testing the component with different sizes of files. Anything larger than about 4 MB caused the error, while smaller files were attached correctly. The final resolution was understanding that .NET, in all of its versions, has a default value for the MAXREQUESTLENGTH variable of 4 MB. Many other solutions have seen this problem. But WorkFlow Solution provides an individual web.config for each project. The instructions to edit the web.config file are outlined in kb.altiris.com/article.asp and that solution should be implemented in each project case where you need a larger file post back size. All of the projects are configured by default under the C:\Program Files\Altiris\Workflow Designer\WorkflowProjects folder. Open the affected project folder and add or edit the respective web.config file to allow the appropriate size for files in your environment. Then add apprpriately-sized attachments to your projects at will.