Respuesta cruda del servidor (el error debería estar aquí):<br><pre>cobranza procesado anteriormente 99999999999</pre><br><hr><br>Información de la petición:<br>Array
(
    [url] => https://parodi.sig2k.net/sigma/parodi-backup@sigma/sigma/api/v10/ImportCobranzas
    [content_type] => text/html; charset=utf-8
    [http_code] => 400
    [header_size] => 249
    [request_size] => 487
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.718569
    [namelookup_time] => 0.001366
    [connect_time] => 0.218881
    [pretransfer_time] => 0.440472
    [size_upload] => 208
    [size_download] => 44
    [speed_download] => 61
    [speed_upload] => 289
    [download_content_length] => 44
    [upload_content_length] => 208
    [starttransfer_time] => 0.718537
    [redirect_time] => 0
    [redirect_url] => 
    [primary_ip] => 179.60.218.39
    [certinfo] => Array
        (
        )

    [primary_port] => 443
    [local_ip] => 64.23.255.21
    [local_port] => 50248
    [http_version] => 2
    [protocol] => 2
    [ssl_verifyresult] => 0
    [scheme] => https
    [appconnect_time_us] => 440359
    [connect_time_us] => 218881
    [namelookup_time_us] => 1366
    [pretransfer_time_us] => 440472
    [redirect_time_us] => 0
    [starttransfer_time_us] => 718537
    [total_time_us] => 718569
    [effective_method] => POST
    [capath] => /etc/ssl/certs
    [cainfo] => /etc/ssl/certs/ca-certificates.crt
)