The l1wptf.dll file belongs to Lotus 1-2-3, a spreadsheet application originally created by the Lotus Development Corporation. The installation software for Lotus SmartSuite includes this file as part of the Lotus 1-2-3 installation steps. Lotus SmartSuite is a set of programs designed to improve office productivity and marketed to businesses. If you are seeing an error with this dynamic link library file, you may not be able to use your Lotus software like you expect to be able to. You should try cleaning your registry to fix this issue.
The registry is the information booth of Windows, keeping track of all your programs and files and telling Windows how to use them. A mistake in the registry can confuse Windows and break your software. ZookaWare PC Cleaner cleans up registry mistakes. ZookaWare PC Cleaner is guaranteed to find and fix every problem in your registry, getting your system back to normal. Scan your computer now with a free ZookaWare PC Cleaner scan to see what mistakes are clogging up your registry.