Optimized FlowHeater Server notifications
Two powerful options have been added to the email notification feature in FlowHeater Server. First, there is now a new send condition: “Only if files were created”. If this option is activated, the notification is only triggered if at least one file was generated during execution. If no file was generated because no newer data was available, no email notification is sent.
Furthermore, it is now possible to compress file attachments and attach them to the email as a ZIP archive. Alternatively, all generated files can be packed into a ZIP archive. To do this, an alternative ZIP archive file name must be specified. All generated files, including the standard output, are then placed in this ZIP archive and attached to the email as a file attachment.
Release notes for version 4.5.3 dated January 3, 2026
JSON Adapter - Grouping via Subelements
The JSON Adapter can now also group or summarize data via any number of subelements (JSON nodes). Previously, this was limited to one level. Furthermore, “DUMMY” fields can be used for grouping, which can optionally be excluded from output to the JSON file.
Designer “Last used directory”
The Designer now remembers the last directory used. This directory is now automatically displayed as the start directory in file selection dialogs. This makes working much smoother, especially if you always work in the same directory tree.
FlowHeater parameter file with preview of values
Previously, only the parameter names from an existing FlowHeater Parameter file were displayed in the “Edit Parameter” dialog; the stored values could not be viewed here. With this version, the values from the parameter file are now also displayed in the “Default Value” field and can be checked without having to view the parameter file.
Split Heater with effect on GroupBy | GroupOut
The String Split Heater can now also be used in a possible grouping (GroupBy or GroupOut). If this option is selected, the String Split Heater automatically returns the correct column index based on the grouping. Previously, this required cumbersome manual constructs using AutoID Heater and IF-THEN-ELSE Heater.
RegEx Heater with Match on Groups and “OnlyFirstMatch”
The RegEx Heater can now also match or split entire groups. If multiple elements are found using the specified “regular expression”, they can be returned separated by an individual separator. Alternatively, the return can also be limited to only the first match.
Corrections (bug fixes)
- Heater General: Freeze if tooltip display with custom comment was too long
- REST API Adapter, no more length limit for static POST data
- Debugging, freeze at breakpoints corrected
- .NET Script Heater, integration of external DLLs corrected
- IF-THEN-ELSE Heater and InString comparisons (**, !*, *=, =*) with NULL values
