Extract From File Node Error: Missing 'attachment_0' Binary Data in Some Items

Based on your description, the error

  This operation expects the node’s input data to contain a binary file “attachment_0”, but none was found [item 4]

indicates that at least one of your items (in this case, item 4) doesn’t have the expected binary property ("attachment_0"). Here are a few things to check:

• Verify Binary Properties Are Present:
  Although the Gmail node appears to deliver binary data (attachment_0 and attachment_1) on some items, not every item might contain one or both of these properties. Ensure that the specific binary property you reference in the Extract from file node exists on every item that reaches it. You might consider inserting a Function or IF node before extraction to check which items actually include “attachment_0” (or your relevant property).

• Correct Binary Property Name:
  Double-check that the property name specified in the Extract from file node exactly matches the name coming from the Gmail node. Even a small typo or mismatch in casing will cause the node not to detect the binary data.

• No Need for Google Drive Node:
  The Gmail node downloads attachments as binary data directly. There’s no need to connect a Google Drive node to re-upload the PDF for the Extract from file node to work. The extraction node is designed to operate on binary data that’s passed directly along in the workflow.

• Handling Multiple Attachments:
  If your workflow can produce items with different attachments, you might want to filter or merge items so that only those with the required binary property are passed to the Extract from file node.

For example, if you want to filter out items missing the “attachment_0” field, you could add a Function node with code like:

JAVASCRIPTCopied
// This function filters out items where "attachment_0" is not defined
return items.filter(item => item.binary && item.binary.attachment_0);

This way, only items with the correct binary data will be processed by the Extract from file node.

In summary, there’s no requirement to use a Google Drive node for the extraction to work. Instead, ensure that the binary property you specify is present on every item passed to the Extract from file node.