Cells Uploading without Values

KNP,

Thanks for getting in touch - for context the troublesome columns are columns 207 through 274.

let
Source = Excel.Workbook(File.Contents("filename.xlsx"), null, true),
EXTRACT_Sheet = Source{[Item="EXTRACT",Kind="Sheet"]}[Data],
#"Changed Type" = Table.TransformColumnTypes(EXTRACT_Sheet,{{"Column1", type text}, {"Column2", type text}, {"Column3", type text}, {"Column4", type any}, {"Column5", type any}, {"Column6", type text}, {"Column7", type text}, {"Column8", type text}, {"Column9", type text}, {"Column10", type any}, {"Column11", type any}, {"Column12", type any}, {"Column13", type any}, {"Column14", type any}, {"Column15", type any}, {"Column16", type any}, {"Column17", type any}, {"Column18", type any}, {"Column19", type any}, {"Column20", type any}, {"Column21", type text}, {"Column22", type any}, {"Column23", type any}, {"Column24", type any}, {"Column25", type text}, {"Column26", type any}, {"Column27", type any}, {"Column28", type any}, {"Column29", type text}, {"Column30", type any}, {"Column31", type any}, {"Column32", type any}, {"Column33", type text}, {"Column34", type any}, {"Column35", type any}, {"Column36", type any}, {"Column37", type text}, {"Column38", type any}, {"Column39", type any}, {"Column40", type any}, {"Column41", type text}, {"Column42", type any}, {"Column43", type any}, {"Column44", type any}, {"Column45", type text}, {"Column46", type any}, {"Column47", type any}, {"Column48", type any}, {"Column49", type text}, {"Column50", type any}, {"Column51", type any}, {"Column52", type any}, {"Column53", type text}, {"Column54", type any}, {"Column55", type any}, {"Column56", type any}, {"Column57", type text}, {"Column58", type any}, {"Column59", type any}, {"Column60", type any}, {"Column61", type text}, {"Column62", type any}, {"Column63", type text}, {"Column64", type text}, {"Column65", type any}, {"Column66", type text}, {"Column67", type text}, {"Column68", type text}, {"Column69", type any}, {"Column70", type text}, {"Column71", type text}, {"Column72", type text}, {"Column73", type text}, {"Column74", type any}, {"Column75", type text}, {"Column76", type text}, {"Column77", type text}, {"Column78", type text}, {"Column79", type text}, {"Column80", type text}, {"Column81", type text}, {"Column82", type text}, {"Column83", type text}, {"Column84", type text}, {"Column85", type text}, {"Column86", type text}, {"Column87", type text}, {"Column88", type text}, {"Column89", type text}, {"Column90", type text}, {"Column91", type text}, {"Column92", type text}, {"Column93", type text}, {"Column94", type text}, {"Column95", type text}, {"Column96", type text}, {"Column97", type text}, {"Column98", type text}, {"Column99", type text}, {"Column100", type text}, {"Column101", type any}, {"Column102", type any}, {"Column103", type text}, {"Column104", type any}, {"Column105", type text}, {"Column106", type any}, {"Column107", type any}, {"Column108", type any}, {"Column109", type any}, {"Column110", type any}, {"Column111", type any}, {"Column112", type text}, {"Column113", type text}, {"Column114", type text}, {"Column115", type text}, {"Column116", type text}, {"Column117", type text}, {"Column118", type text}, {"Column119", type text}, {"Column120", type text}, {"Column121", type text}, {"Column122", type text}, {"Column123", type text}, {"Column124", type text}, {"Column125", type text}, {"Column126", type text}, {"Column127", type text}, {"Column128", type text}, {"Column129", type any}, {"Column130", type text}, {"Column131", type text}, {"Column132", type any}, {"Column133", type text}, {"Column134", type text}, {"Column135", type any}, {"Column136", type text}, {"Column137", type any}, {"Column138", type text}, {"Column139", type text}, {"Column140", type text}, {"Column141", type text}, {"Column142", type text}, {"Column143", type text}, {"Column144", type text}, {"Column145", type text}, {"Column146", type text}, {"Column147", type text}, {"Column148", type text}, {"Column149", type text}, {"Column150", type text}, {"Column151", type text}, {"Column152", type text}, {"Column153", type text}, {"Column154", type text}, {"Column155", type text}, {"Column156", type text}, {"Column157", type text}, {"Column158", type text}, {"Column159", type text}, {"Column160", type text}, {"Column161", type text}, {"Column162", type text}, {"Column163", type text}, {"Column164", type text}, {"Column165", type text}, {"Column166", type text}, {"Column167", type text}, {"Column168", type text}, {"Column169", type text}, {"Column170", type text}, {"Column171", type text}, {"Column172", type text}, {"Column173", type text}, {"Column174", type text}, {"Column175", type text}, {"Column176", type text}, {"Column177", type text}, {"Column178", type text}, {"Column179", type text}, {"Column180", type text}, {"Column181", type text}, {"Column182", type text}, {"Column183", type text}, {"Column184", type text}, {"Column185", type text}, {"Column186", type text}, {"Column187", type text}, {"Column188", type text}, {"Column189", type text}, {"Column190", type text}, {"Column191", type text}, {"Column192", type text}, {"Column193", type text}, {"Column194", type text}, {"Column195", type text}, {"Column196", type text}, {"Column197", type text}, {"Column198", type text}, {"Column199", type text}, {"Column200", type text}, {"Column201", type text}, {"Column202", type text}, {"Column203", type text}, {"Column204", type text}, {"Column205", type text}, {"Column206", type text}, {"Column207", Int64.Type}, {"Column208", Int64.Type}, {"Column209", Int64.Type}, {"Column210", Int64.Type}, {"Column211", Int64.Type}, {"Column212", Int64.Type}, {"Column213", Int64.Type}, {"Column214", Int64.Type}, {"Column215", Int64.Type}, {"Column216", Int64.Type}, {"Column217", Int64.Type}, {"Column218", Int64.Type}, {"Column219", Int64.Type}, {"Column220", Int64.Type}, {"Column221", Int64.Type}, {"Column222", Int64.Type}, {"Column223", Int64.Type}, {"Column224", Int64.Type}, {"Column225", Int64.Type}, {"Column226", Int64.Type}, {"Column227", Int64.Type}, {"Column228", Int64.Type}, {"Column229", Int64.Type}, {"Column230", Int64.Type}, {"Column231", Int64.Type}, {"Column232", Int64.Type}, {"Column233", Int64.Type}, {"Column234", Int64.Type}, {"Column235", Int64.Type}, {"Column236", Int64.Type}, {"Column237", Int64.Type}, {"Column238", Int64.Type}, {"Column239", Int64.Type}, {"Column240", Int64.Type}, {"Column241", Int64.Type}, {"Column242", Int64.Type}, {"Column243", Int64.Type}, {"Column244", Int64.Type}, {"Column245", Int64.Type}, {"Column246", Int64.Type}, {"Column247", Int64.Type}, {"Column248", Int64.Type}, {"Column249", Int64.Type}, {"Column250", Int64.Type}, {"Column251", Int64.Type}, {"Column252", Int64.Type}, {"Column253", Int64.Type}, {"Column254", Int64.Type}, {"Column255", Int64.Type}, {"Column256", Int64.Type}, {"Column257", Int64.Type}, {"Column258", Int64.Type}, {"Column259", Int64.Type}, {"Column260", Int64.Type}, {"Column261", Int64.Type}, {"Column262", Int64.Type}, {"Column263", Int64.Type}, {"Column264", Int64.Type}, {"Column265", Int64.Type}, {"Column266", Int64.Type}, {"Column267", Int64.Type}, {"Column268", Int64.Type}, {"Column269", Int64.Type}, {"Column270", Int64.Type}, {"Column271", Int64.Type}, {"Column272", Int64.Type}, {"Column273", Int64.Type}, {"Column274", Int64.Type}, {"Column275", type text}, {"Column276", type text}}),