Error during parsing of SST file(s)

[tcj]

Processing Spotter displacement output - SST
Traceback (most recent call last):
  File "/Users/tcj/src/spotter-sd-parser/sd_file_parser.py", line 1751, in <module>
    main(**arguments)
  File "/Users/tcj/src/spotter-sd-parser/sd_file_parser.py", line 547, in main
    parseLocationFiles(inputFileName = fileName, kind=suffix,
  File "/Users/tcj/src/spotter-sd-parser/sd_file_parser.py", line 657, in parseLocationFiles
    msk = np.isnan(data[:, 0])
          ^^^^^^^^^^^^^^^^^^^^
TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

[tcj]

% ls -lrt *SST*
-rw-rw-rw-@ 1 tcj  staff  38 Nov 14 20:21 0000_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Nov 14 20:23 0001_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Nov 14 21:27 0003_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Nov 14 21:47 0004_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Nov 14 21:48 0005_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Nov 28 18:53 0006_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Nov 28 18:55 0007_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Nov 29 08:49 0008_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Nov 30 14:54 0009_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Nov 30 14:56 0010_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Dec  2 01:15 0011_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Dec  3 05:29 0012_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Dec  3 05:30 0013_SST.csv
-rw-rw-rw-@ 1 tcj  staff  38 Dec  3 06:31 0014_SST.csv
% cat *SST*
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)
timestamp (ticks/UTC),temperature (C)