Hey James,
no I don’t have another Sd-card at hand.

However I also found some other error msg in the log, nameley:
…
1499189951.084, 5.074326E000, 3.742568E001
1499189952.084, 5.074605E000, 3.742852E001
1499189953.085, 5.074579E000, 3.743193E001
CH1: AMPS 10A
CH2: VOLT 60V
SMPL: 0064 0125Hz
UTC TIME SEC ,CH1 AMPS DC ,CH2 VOLT DC
1499189953.662, 5.074285E000, 3.748391E001,000460
1499189954.730, 5.074359E000, 3.748613E001
…

and:
…
499208500.840, 2.909824E-02, 4.171966E001
1499208502.741, 2.826377E-02, 4.171989E001
1499208503.424, 2.780556E-02, 4.171985E001
1500151023.665,-4.231930E-03, 3.407281E001,000470
1500151024.724, 5.049754E000, 3.588818E001
1500151034.812, 5.052097E000, 3.600449E001
1500151044.894, 5.051058E000, 3.607574E001
1500151054.985, 5.051471E000, 3.613223E001
1500151073.664, 5.052581E000, 3.618019E001,000264
1500151075.156, 5.054406E000, 3.622146E001
…