New features and / or  enhancements

Surveys/Audit Trail

Castor Connect Push notifications are now recorded in the Audit Trail

Audit trail events associated with Castor Connect surveys have been extended to include push notifications, allowing greater traceability

On-Site ePRO

Add the on-site indicator to the participant-level listing

An 'On-site' completion indicator, consistent with what is presented in the study-level survey listings, is now available for use within the individual survey listing view

Email notifications

Redesign of the Notifications Configuration Page 

The Notifications configuration page has been redesigned, enabling study administrators to manage email notification settings through a modernized interface while maintaining complete feature parity with the legacy system. The implementation preserves all existing notification event types, recipient management, site filtering, template configuration, and dynamic tag support, ensuring uninterrupted workflows for configuring automated notifications across field results, form signatures, and repeating data events. 

The Notifications management interface now displays unique identifiers and associated site selections for each notification configuration, enabling study designers and administrators to track and audit notification rules more effectively. The implementation adds two new columns (Notification Configuration ID and Sites) while introducing a sticky first column and header for improved navigation during horizontal scrolling.

Login & Registration

Self-service sign-up and user invitations now go through our central Castor Identity platform

[Self] Users who are invited to join a study and who previously had no Castor account will now be invited through our central Identity platform instead of through CDMS itself, so that they directly have a central Identity account that can be used to access any Castor service.

Also, users who register themselves for CDMS will now directly be registered on our central Castor Identity platform.

SMS 2FA now available in NL and BE

Users in The Netherlands and Belgium can now configure two-factor authentication in their Account settings to use text messages (SMS) as a fallback mechanism for regular TOTP 2FA (e.g. Google Authenticator). 

This is a localized pilot that will be extended to other countries when successful.

Passkey support for 2FA

Castor now supports using Passkeys as a second factor for authentication, as a backup option for TOTP codes (Google Authenticator).

Reporting

Add 'Refresh' button to Participant & RDI data listings

The Refresh capability has been extended to key data listing pages in Castor CDMS to improve workflow efficiency for study users and clinicians. Users can now manually refresh data on the Participants Overview and Repeating Data Instance (RDI) overviews -both global and participant level- without losing their current filters, sorting or search settings. The refresh action instantly updates the page with the latest data while preserving user context, eliminating the need for a full page reload. A tooltip now displays when the view was last refreshed and by whom, ensuring transparency and easier collaboration in data review workflows.

System defects fixes

Participant Data Export

Empty inapplicable checkbox fields are now exported as empty cells instead of 0 in domain-based (grouped) exports

We made a small change in how empty checkbox fields are exported in the domain based exports. Before, when a checkbox field initially had a value that was later cleared, a 0 value would be exported, whereas a checkbox field that was never checked in the first place would be exported as an empty cell. In this release that behavior changes, so that checkbox fields that were initially checked and later cleared will now also be exported as empty cells.

Data Import

“Email address viewed” Audit Trail events no longer logged when participants email addresses are imported

  Audit Trail now accurately tracks participant email address changes, eliminating spurious "Email address viewed" events during data import operations.

Audit Trail

Events change log contains certain user entry words replaced with the other ones

We fixed a rendering issue in the Audit Trail UI, where some automated nomenclature updates (e.g. "Report" -> "Repeating Data" and "Institute" -> "Site") were performed not only on event properties, but also on their contents. This has now been corrected.

Modern Data Entry

Dropdown with a large option group (250+ options) does not work in grid field 

We have addressed an issue where dropdown cells in grid fields using option groups with more than 250 options were not functioning correctly. 

Previously, selected values in these large option groups were not stored or reflected in calculations, and the chosen options disappeared after refreshing the page. 

This fix ensures that selected values are now saved, displayed consistently after reload and correctly available for use in calculations.

Layout

Search input wraps onto the second line in smaller screens

We have fixed a layout issue on the My Studies page where, on small screens (i.e 375px width), the search bar would wrap onto a second line when the search button was clicked. The layout now adapts responsively, displaying the search input in a compact, single-line view.

Field Preview

##allowempty## and ##setemptytozero## do not instantly take effect

The Field Preview dialog now correctly applies calculation pragmas on initial render, ensuring study designers see accurate empty-value handling for numeric calculations without requiring user interaction. 

The fix resolves a template initialization issue where ##allowempty## and ##setemptytozero## directives were not processed on first render and enhances study design reliability and reduces preview-to-production discrepancies for calculation fields using empty-value handling directives.

Unexpected logoffs when multiple tabs open

Session management now maintains independent session lifecycles across multiple browser tabs, preventing unexpected logouts when users work with different studies simultaneously. Previously, an expired session in one inactive tab would terminate all active sessions, disrupting data entry workflows for users managing multiple studies.

Session expiration modal

Modal counter is stuck at the end and logout doesn't happen

The session expiration countdown modal now properly triggers automatic logout at expiration.

2FA session cache not invalidated when user enables 2FA, blocking study access

Currently, users who enable 2FA after logging in cannot access studies that require 2FA enforcement, even though they have successfully enabled 2FA in Castor Identity. 

The system incorrectly reports that 2FA is not activated. Users must log out and log back in to clear the session cache. This defect fix will enhance the user experience by immediately allowing access to the restricted studies upon activation of 2FA.

API

Mismatch between return properties between Swagger definition and responses for Retrieves the list of all available fields and Retrieves a single Field requests 

The Field API endpoints now return response schemas that accurately align with OpenAPI documentation, ensuring consistent integration for API  consumers. 

The implementation corrected type mismatches for required/hidden field properties (now properly typed as integers), standardized HAL hypermedia link formatting (using _links.self consistently), and added missing dependency relationship properties to the specification.

Mismatch between returned response and Swagger definition for Query endpoints

API documentation for Query endpoints now accurately reflects the response structure.

Edit/Save survey invitation properties with an invalid email shows error on page 

The Edit Survey Invitation dialog now displays clear validation errors when invalid email formats are entered instead of a generic error message.

"Study archive failed" message is not informative for the user

Study archive error messaging now provides actionable guidance when archival fails, enabling study administrators to quickly resolve blocking conditions. 

Previously, attempting to archive a live or linked study displayed a generic "Something went wrong" error that required support escalation to diagnose. 

The updated error handling returns context-specific messages that identify whether the study is live or linked, with direct instructions for resolving each condition through study settings or the study link section. 

This reduces support burden and enables self-service resolution for common archival prerequisites.

Fix broken help-desk Form Sync link

We fixed a broken link in the Form Sync overview page.

Known release limitations 

NA

Supported Browser & OS versions for CDMS v2026.1

For more details you can review Castor’s Browser and Operating System (OS) Policy.
 

Supported Browsers

Supported Operating Systems