checking R code for possible problems ... NOTE
SEC_13F_list: no visible binding for global variable 'PDF_STRING'
SEC_13F_list: no visible binding for global variable 'CUSIP_start'
SEC_13F_list: no visible binding for global variable
'ISSUER_NAME_start'
SEC_13F_list: no visible binding for global variable
'ISSUER_DESCRIPTION_start'
SEC_13F_list: no visible binding for global variable 'STATUS_start'
SEC_13F_list: no visible binding for global variable 'CUSIP_end'
SEC_13F_list: no visible binding for global variable 'STATUS_end'
SEC_13F_list: no visible binding for global variable
'HAS_LISTED_OPTION_start'
SEC_13F_list: no visible binding for global variable
'HAS_LISTED_OPTION_end'
SEC_13F_list: no visible binding for global variable 'ISSUER_NAME_end'
SEC_13F_list: no visible binding for global variable
'ISSUER_DESCRIPTION_end'
SEC_13F_list: no visible binding for global variable 'CUSIP'
Undefined global functions or variables:
CUSIP CUSIP_end CUSIP_start HAS_LISTED_OPTION_end
HAS_LISTED_OPTION_start ISSUER_DESCRIPTION_end
ISSUER_DESCRIPTION_start ISSUER_NAME_end ISSUER_NAME_start PDF_STRING
STATUS_end STATUS_start