I have a 64 bit machine.
One of my projects I have the properties of the project for Run64BitRunTime = False and I still get the following error when attaching to an Excel xlsx source in order to import into SQL 2012.
Error 1
Validation error. Data Flow Task: Package1: The requested OLE DB provider Microsoft.ACE.OLEDB.12.0 is not registered. If the 32-bit driver is not installed, run the package in 64-bit mode. Error code: 0x00000000. An OLE DB record is available. Source: "Microsoft OLE DB Service Components" Hresult: 0x80040154 Description: "Class not registered". Package1.dtsx 0 0
Error 2
Validation error. Data Flow Task: Package1: The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine. For more information, see http://go.microsoft.com/fwlink/?LinkId=219816 Package1.dtsx 0 0
Installed the following (32 bit)
https://www.microsoft.com/en-us/download/details.aspx?id=13255