When receiving this error check the file size of the Fund Statement zip file that is generated. The Maximum file size that is allowed to be upload to DonorCentral NXT at once is 50mbs. Anything over this file size will not be able to be uploaded to DonorCentral NXT. In order to upload your Fund Statements you will need to process the Fund Statement Export process in FIMS in multiple batches in order to get each zip file size below the 50mb maximum limit.