Report Bounded and fixed strings in LabVIEW General Posted October 5 On 7/9/2012 at 7:12 AM, flarn2006 said: preAllocateUIEnabled=True Did you know that this option shows "Autopreallocate arrays and strings" checkbox on VI Properties -> Execution tab? Here's the excerpt from the LabVIEW Help about this setting. Quote Autopreallocate arrays and strings — (FPGA Module) Optimizes array and string operations. This option forces LabVIEW to preallocate memory at compile time rather than dynamically allocating memory at run time. By default, the FPGA Module displays this option for VIs under FPGA targets in the Project Explorer window. This option must be enabled before you can compile VIs that use arrays or strings for FPGA devices. LabVIEW disables the Autopreallocate arrays and strings option on installations of LabVIEW without the FPGA Module. If you create a VI in a version of LabVIEW that does not have the FPGA Module installed and you later target that VI to an FPGA device, you must explicitly place a checkmark in the Autopreallocate arrays and strings checkbox and test the behavior of the VI on the FPGA device to verify that it is operating as expected.