OK, If you are simulating for 7 days, then the problem is not related to the error I think.
I have looked at your file furthermore:
I made a diff of LXB_Build_FMU.expidf (in both Output folder of your runs) and see some difference in the following parameters/settings for the Windows
In the FMU 1.0 output folder (Output_EPExport_Slave) I see
AirflowNetwork:MultiZone:Component:DetailedOpening,
Window Large,
0.0001,
AirflowNetwork:MultiZone:Component:DetailedOpening,
Window Medium,
0.0001,
In the FMU 2.0 output folder (Output_EPExport_Model) I see
AirflowNetwork:MultiZone:Component:DetailedOpening,
Window Large,
0.025,
AirflowNetwork:MultiZone:Component:DetailedOpening,
Window Medium,
0.025,
Why do you have such a difference in both models?
This difference is probably also reflected in your original IDF files since the expidf is from the original IDF.