There are a few things that could be impacting this particular issue. If you know you have completed paint jobs and should have new costs to import there are three things to check based on your paint scale software.
First, lets check that PMCI is looking in the correct directory for the file. On the Setup tab verify the file path for the "Cost Export Folder:" this path should match what your mix software has for its export path. If these paths do not match correct them so that both applications are pointed to the same directory, there is no required path. Once matched try manually exporting from your scale software, check with your mix software support to obtain instructions.
Second, check to see if you are exporting in the correct file format. PMCI expects an XML file to be placed in the Cost Export Folder, any other file type would not be recognized by PMCI. Verify your file format and adjust accordingly to XML.
Finally, check to see if your scale software is running or shut it down and restart it. Many times when we have recieved calls about this issue we find the paint scale software is frozen or its export component is not even running. Simply close the software and reopen it, should the problems persist at this point please contact Summit Support for additional assistance.