Error: "Unknown doc type" when using wt.load.LoadFromFile to load a soft type of Document in Windchill PDMLink

Create Document Failed (***): Unknown document type <WCTYPE|wt.doc.WTDocument|***>
Loader method wt.doc.LoadDoc.beginCreateWTDocument reported a failure
No objects were imported due to the error.
Problem in export/import process.
Nested exception is: wt.util.WTException: Loader method wt.doc.LoadDoc.beginCreateWTDocument reported a failure Error loading data from file.
data file = <***>
map file = <null,null>
token separator = <null,null>
method = <null,create>
user = <null>
Command line = <{User=, CONT_PATH=/wt.inf.container.OrgContainer=***/wt.pdmlink.PDMLinkProduct=***), Password=}>
Problem in export/import process.
Nested exception is: wt.util.WTException: Loader method wt.doc.LoadDoc.beginCreateWTDocument reported a failure

setType: Ignoring invalid type: wt.doc.WTDocument|<Internal Name of Subtype>

Create Document Failed (***): wt.vc.VersionControlException: (wt.series.seriesResource/2) wt.series.SeriesException: The revision value is not valid within the series: 1, series=Default
Nested exception is: The revision value is not valid within the series: 1, series=Default
Nested exception is: (wt.series.seriesResource/2) wt.series.SeriesException: The revision value is not valid within the series: 1, series=Default
Nested exception is: The revision value is not valid within the series: 1, series=Default
Nested exception is: wt.vc.VersionControlException: (wt.series.seriesResource/2) wt.series.SeriesException: The revision value is not valid within the series: 1, series=Default
Nested exception is: The revision value is not valid within the series: 1, series=Default
Nested exception is: wt.series.SeriesException: The revision value is not valid within the series: 1, series=Default
Nested exception is: wt.util.WTPropertyVetoException: The revision value is not valid within the series: 1, series=Default
Loader method wt.doc.LoadDoc.beginCreateWTDocument reported a failure
No objects were imported due to the error.
Problem in export/import process.
Nested exception is: wt.util.WTException: Loader method wt.doc.LoadDoc.beginCreateWTDocument reported a failure Error loading data from file.
data file = <***>
map file = <null,null>
token separator = <null,null>
method = <null,create>
user = <null>
Command line = <{User=, CONT_PATH=/wt.inf.container.OrgContainer=***/wt.pdmlink.PDMLinkProduct=***, Password=}>
Problem in export/import process.
Nested exception is: wt.util.WTException: Loader method wt.doc.LoadDoc.beginCreateWTDocument reported a failure