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How-to · Asseco Solutions

HELIOS iNuvio / Nephrite: invoice import and export

Verteco Peppol supports the HELIOS iNuvio / Nephrite format in both directions: invoices that reach you through the Peppol network are downloaded as a file that HELIOS iNuvio / Nephrite imports without retyping, and invoices issued in HELIOS iNuvio / Nephrite are uploaded to the portal and sent to your customers through Peppol. Amounts, VAT rates and document numbers are always taken exactly from the invoice; nothing is recalculated. Why e-invoicing is worth sorting out alongside HELIOS iNuvio / Nephrite is explained on a separate page.

Verteco's price is public and the same for everyone (price list); fees for a module, licence or update of HELIOS iNuvio / Nephrite are its vendor's fees agreed with the vendor.

1. Move invoices from the portal into HELIOS iNuvio / Nephrite

Download received and issued invoices in bulk for a chosen period, or one at a time from the invoice detail.

  1. 1
    In the portal open Exports (left menu, address /dashboard/exports). Choose the company; if you like, narrow the period From date / To date and the direction (Received and sent, Received only, Sent only).
  2. 2
    In the Universal formats section click Download on the ISDOC (.zip) tile. The file peppol-isdoc.zip downloads.
  3. 3
    Unzip the file. It contains:
    • prijate/<číslo>.isdoc – received invoices and credit notes in ISDOC 6.0.2 format, one file per document
    • odoslane/<číslo>.isdoc – issued invoices and credit notes in ISDOC 6.0.2 format, one file per document
    • _preskocene.txt – documents the format cannot carry, with the reason for each
  4. 4
    The exact menu path in HELIOS iNuvio / Nephrite for importing invoices from an XML file is in its manual or known to the program's vendor; menus change between versions, so we would rather not quote one from memory here. Send us a screenshot and we will add it to the how-to.
  5. 5
    If a document is missing, look into _preskocene.txt: every omitted document has its reason there (see What the format cannot carry). Nothing is left out silently.

One invoice: in the invoice detail, section Accounting data, use Export this document to… and pick HELIOS iNuvio / Nephrite. A selection: tick documents in the invoice list, choose HELIOS iNuvio / Nephrite in the Accounting software field of the bar below the list and click Download.

What to know before the first import

  • Both HELIOS iNuvio and HELIOS Nephrite work with the ISDOC format (document import and export) and, according to the Slovensko.Digital overview of September 2026, with UBL as well; check the availability of the ISDOC interface in your installation and version with your implementation partner or in the Asseco Solutions documentation.
  • You can also bring issued invoices from HELIOS as UBL XML: upload them on the Send from a file tab (XML format), without conversion through ISDOC.
  • Received invoices are in the prijate folder of the ZIP, issued ones in the odoslane folder; when importing into HELIOS pick the right ledger (incoming or issued invoices).

2. Send invoices issued in HELIOS iNuvio / Nephrite through Peppol

You keep issuing invoices in your program. You upload its export to the portal and the portal delivers them to your customers through the Peppol network, with a delivery receipt and the report to the Financial Administration.

  1. 6
    The exact menu path in HELIOS iNuvio / Nephrite for exporting issued invoices to XML is in its manual or known to the program's vendor; menus change between versions, so we would rather not quote one from memory here. Send us a screenshot and we will add it to the how-to.
  2. 7
    In the portal open Send e-invoice and the Bulk send tab; the direct link /dashboard/invoices/new?tab=bulk opens the tab with the ISDOC tile already selected. Otherwise click the tile and choose Select.
  3. 8
    Choose the Company (sender) and upload the exported files; you can select several at once. The portal imports only invoices you issued (supplier = your company); received invoices in the same file are skipped.
  4. 9
    Check the preview: the portal reads the lines, recalculates the totals the same way as for a manually issued invoice and compares them with the totals in the file. If they differ by even a cent, the invoice gets an error and does not leave; fix it in the program and export again. The customer must be in the Peppol network, which you check on /overenie.
  5. 10
    Click Send. Invoices leave one by one; the status and the delivery receipt are shown under Invoices – sent.

3. What the format cannot carry

The export never guesses values that the HELIOS iNuvio / Nephrite format has nowhere to store. Such a document is listed in _preskocene.txt with the reason and stays available in the portal as PDF and original XML.

  • a document that could not be read from the stored UBL (the invoice number is missing)

Something off during the import?

Send us the message from HELIOS iNuvio / Nephrite and the file you imported, through Support in the portal or to peppol​@​verteco.digital. We will fine-tune the format. You can try the whole procedure without risk in the test environment.

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