New Abs Heater for calculating absolute values

In calculations, it is often necessary to obtain the absolute positive value of a number. With this release, a new “Absolute” number heater has been introduced that can do exactly that. The Absolute Heater determines the absolute “positive” value of a number, which can then be used in further calculations.

Release notes for version 4.5.4 dated April 25, 2026

Actively influence the execution order of functions

Previously, it was not possible to directly influence the execution order of the Heaters/Functions. With this version, it is now possible to influence the execution order for some FlowCtrl Heaters (=yellow). As soon as more than one FlowCtrl Heater is dragged onto the Designer, the execution order can now be actively controlled or set via an additional dialog.

REST API Adapter with New “RequestQueryParameter” Field Type

The REST API Adapter has been enhanced with the “RequestQueryParameter” field type. This makes it very easy to transmit query parameters via the request URL using the field list, without having to manually encode them in the URL using FlowHeater Parameters. The REST API Adapter automatically handles the encoding of HTML special characters and ensures that dates and/or numbers are passed according to the specified requirements.

JSON Adapter Optimization for Dynamic Reading

The JSON Adapter has been optimized for dynamic reading. With this version, wildcards (* ) can now be used in the JPATH, and the specification and selection of parent nodes have been improved. It is now possible to branch further down from the parent node.

FlowHeater Server Switch to TCP Listener

The FlowHeater Server no longer communicates with the Server Manager or running batch module tasks via “NamedPipes”. With this version, FlowHeater Server has been switched to a TCP/IP listener. Both IPv4 and IPv6 are supported. Communication currently takes place exclusively via “localhost”; no firewall configuration is required. The TCP/IP port used is 1103. The port can be changed via the registry entry “HKEY_LOCAL_MACHINE\Software\FlowHeater GmbH\FlowHeater Server V4\ServerPort”.

Corrections (bug fixes)

TextFile Adapter: Fix for custom column delimiters when the length exceeds 1
License activation for parallel operation of 32-bit and 64-bit versions
InMemory Adapter and field transfer from database adapters
Designer: Undo/Redo functionality for changes
JSON Adapter: Issues with internal post-processing across multiple processing steps
XML Adapter: Attributes and namespaces are now always read in on the READ side as well