Method for checking the integrity of reloadable functional units (HWAA1, HWAA2) which are reloaded, in the form of configuration files during a runtime of an electronic component (BE) designed as a programmable integrated circuit, into sub-regions (C1, C2) of a dynamically reconfigurable region (DPR) of the electronic component (BE), wherein the reloadable functional units (HWAA1, HWAA2) have predefined interfaces which match corresponding interfaces (IIF, OIF) of those sub-regions (C1, C2) of the dynamically reconfigurable region (DPR) of the electronic component (BE) into which the reloadable functional units (HWAA1, HWAA2) can be loaded, characterized in that: - for each reloadable functional unit (HWAA1, HWAA2), a predetermined sub-region (Ct) of the dynamically reconfigurable region (DPR) is preconfigured with a corresponding, associated, functionally identical twin functional unit (HWAAT), which has a basic structure of reloadable functional units (HWAA1, HWAA2) of the electronic component (BE) in the form of logic circuit functions; - in that a reloadable functional unit (HWAA1) is loaded into a predetermined sub-region (C1, C2) of the dynamically reconfigurable region (DPR) at the runtime of the electronic component (BE); - in that the loaded reloadable functional unit (HWAA1) and the associated twin functional unit (HWAAT) are supplied with identical input data (IN) and are executed in parallel ; - in that the output data (O_HWAA1) of the loaded reloadable functional unit (HWAA1) and the output data (O_HWAAT) of the associated twin functional unit (HWAAT) are compared ; - and in that the loaded reloadable functional unit (HWAA1) is enabled and the output data (O_HWAA1) of the loaded reloadable functional unit (HWAA1) is forwarded when a match is detected between the output data (O_HWAA1) of the reloadable functional unit (HWAA1) and the output data (O_HWAAT) of the associated twin functional unit (HWAAT). - for each reloadable functional unit (HWAA1, HWAA2), a predetermined sub-region (Ct) of the dynamically reconfigurable region (DPR) is preconfigured with a corresponding, associated, functionally identical twin functional unit (HWAAT), which has a basic structure of reloadable functional units (HWAA1, HWAA2) of the electronic component (BE) in the form of logic circuit functions; - in that a reloadable functional unit (HWAA1) is loaded into a predetermined sub-region (C1, C2) of the dynamically reconfigurable region (DPR) at the runtime of the electronic component (BE); - in that the loaded reloadable functional unit (HWAA1) and the associated twin functional unit (HWAAT) are supplied with identical input data (IN) and are executed in parallel ; - in that the output data (O_HWAA1) of the loaded reloadable functional unit (HWAA1) and the output data (O_HWAAT) of the associated twin functional unit (HWAAT) are compared ; - and in that the loaded reloadable functional unit (HWAA1) is enabled and the output data (O_HWAA1) of the loaded reloadable functional unit (HWAA1) is forwarded when a match is detected between the output data (O_HWAA1) of the reloadable functional unit (HWAA1) and the output data (O_HWAAT) of the associated twin functional unit (HWAAT). <EOS>