New Post: Manual upgrade 4.0 -> 4.1

Try removing the data type from the data store, the system should recreate it afterwards.
The steps are:

0) Stop the website on IIS
1) Delete ~/App_Data/Composite/DataMetaData/ICustomFunctionCallEditorMapping_67cf4b4d-1376-4589-abd4-5cfa9966670b.xml
2) Edit ~/App_Data/Composite/Configuration/DynamicSqlDataProvider.config

remove reference to the datatype "67cf4b4d-1376-4589-abd4-5cfa9966670b":

<add dataTypeId="67cf4b4d-1376-4589-abd4-5cfa9966670b" isGeneratedType="false">
                <Stores>
                    <add tableName="Composite_Data_Types_ICustomFunctionCallEditorMapping"
                        dataScope="public" cultureName="" />
                </Stores>
                <DataIdProperties>
                    <add name="FunctionName" type="System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
                </DataIdProperties>
            </add>

3) Remove the SQL table Composite_Data_Types_ICustomFunctionCallEditorMapping*
4) Start the website on IIS.