Good morning, I have been following along with the Spark Tutorial in Microsoft Fabric and ran into an interesting issue that I have yet to understand. After leaving my office Friday I paused the lesson after running the line of code: df = spark.read.csv('Files/property-sales-extended.csv', header=True, inferSchema=True) df.show() The code ran fine on Friday and did again this morning. After loading another file the code failed: df = spark.read.csv('Files/property-sales-missing.csv', header=True, inferSchema=True) df.show() The error message was that the path was not valid. Same LakeHouse, same folder, same everything as far as I could tell. I solved the issue by changing the call to explicitly include the name of the LakeHouse folder: df = spark.read.csv('Files/csv/property-sales-missing.csv', header=True, inferSchema=True) df.show() The ABFS path also works. Can someone help me understand the reason for this? Thanks, Steve Malcolm