I have about 1,000 KMLs in a folder, all with the same schema and only one feature each (line features). I want to bring in each KML into a single feature class in a file geodatabase in ArcGIS Pro and populate a field in that feature class with the unique name of each KML. Is there a way to even do this in FME? Thanks!

This is not too hard.Initiate with a Creator.FeatureReader (Directory and File Pathnames) to scan the directory with files.FeatureReader (OGC / Google KML) to read all files found by setting the Dataset to the attribute path_windows. Under Output Ports, choose Single Output Port. Under Attributes choose Merge Initiator and Result.AttributeCreator, create a field OriginalFileName value path_filename.FeatureWriter, define gdb and featureclassname, attribute OriginalFileName.

This is not too hard.Initiate with a Creator.FeatureReader (Directory and File Pathnames) to scan the directory with files.FeatureReader (OGC / Google KML) to read all files found by setting the Dataset to the attribute path_windows. Under Output Ports, choose Single Output Port. Under Attributes choose Merge Initiator and Result.AttributeCreator, create a field OriginalFileName value path_filename.FeatureWriter, define gdb and featureclassname, attribute OriginalFileName.Thanks for your help! This does seem doable but I guess I am not putting in all the variables correctly since I get an error (this error is about "Cannot open dataset 'path_windows'" and error initializing the KML reader).This is what my flow looks like with the property dialog boxes (not sure how well it will show up here).

Batch KML to Layer in ArcGIS Pro, but all append to one layer

This is not too hard.

Initiate with a Creator.
FeatureReader (Directory and File Pathnames) to scan the directory with files.
FeatureReader (OGC / Google KML) to read all files found by setting the Dataset to the attribute path_windows. Under Output Ports, choose Single Output Port. Under Attributes choose Merge Initiator and Result.
AttributeCreator, create a field OriginalFileName value path_filename.
FeatureWriter, define gdb and featureclassname, attribute OriginalFileName.

This is not too hard.

Initiate with a Creator.
FeatureReader (Directory and File Pathnames) to scan the directory with files.
FeatureReader (OGC / Google KML) to read all files found by setting the Dataset to the attribute path_windows. Under Output Ports, choose Single Output Port. Under Attributes choose Merge Initiator and Result.
AttributeCreator, create a field OriginalFileName value path_filename.
FeatureWriter, define gdb and featureclassname, attribute OriginalFileName.

Thanks for your help! This does seem doable but I guess I am not putting in all the variables correctly since I get an error (this error is about "Cannot open dataset 'path_windows'" and error initializing the KML reader).