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FEKO: error 52001
Hello, I had the following error in simulating in FEKO a scenario with an impressed nearfield source. The normal vectors on a CFIE/MFIE/thick coating body point outwards. All sources should consistently be defined outside of this body. What does it mean? How can I fix it?
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FEKO 2026.1.2 Student Edition download fails SHA-256 and CRC verification
I downloaded Feko 2026.1.2 Windows x86_64 directly from Altair One Marketplace. The downloaded ZIP fails the SHA-256 check and 7-Zip reports a CRC failure. Official SHA-256: 1135fe3e33617f4436e016b0a922590d97e9b556823f9c2289208cd01d5623f7 Downloaded file SHA-256:…
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Student Activation Key Error -29: FEKOGUI Feature Not Found
Student Activation Key Error -29: FEKOGUI Feature Not Found Hello, I am using the Altair Student Edition via Managed Licensing / Activation Key. When launching CADFEKO (v2026.1), I receive the following error: Altair Managed Licensing: License error Feature: FEKOGUI Error Code: -29 Error Description: Requested CT/TTF…
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FEKO : At which distance the Far Field Electric field is computed ?
Hello, In FEKO, I can ask for a far field computation, and see the E field value. However, the E field I presume decay as 1/r. I see a value of 32mV maximum in my 3D pattern. → At which distance this pattern is computed ? At the definition of the far field ? Thanks !
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FEKO periodic boundary conditions
If I use the periodic boundary conditions to simulate a large array, mutual coupling between elements is taken into account? or it is like a simple application of the array factor to the single element radiation pattern?
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parallel computing
If I installed FEKO on 3 connected workstations that together have 2 TB of RAM, can I use all the available RAM for a single simulation by putting the workstations in parallel? Do I need a special license?
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Unable to start Feko
I was able to run Feko earlier this week. Today I am met with this error when I try to run any of the Feko components, like WallMan or ProMan: I have obscured the activation key: License Error! Cannot initialize license: Altair License Manager: License error Feature(s): GlobalZoneEU, HyperWorks, HWFekoGUI Error Code: 9…
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Windows Remote Desktop not supported
Hello, I get an error with my student license which says that Windows Remote Desktop is not supported. I am trying to set it up on a lab server since my personal laptop is ARM-based and therefore local installation is not possible. Does this mean that there is no way to set up this student license on my lab server for me…
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Looking for guidance on proper FEKO preprocessing regarding current sharing of stacked helical coils
I've got the following setup, but am experiencing odd behavior related to mesh error. For example, when I increase the number of wire segments, and correspondingly the error associated with that wire, I notice that the current sharing in each wire begins to balance. This is counterintuitive, but perhaps the current in each…
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I am getting an Error 3798 and I don't know what the issue is
"ERROR 3978: Internal Feko error. Please notify the Feko support team and provide the error number, preferably together with the Feko input and output files." I have added a planar multilayer substrate which has been configured as follows. I added an electric dipole source which is not clashing with the structure and I…
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Numerical Inconsistencies in modelling objects inside an infinite plane in FEKO.
Description: I am trying to model an antenna above an infinite soil plane, with small objects embedded inside the infinite soil plane, to see the impact of inhomogeneous soil on the behavior of the antenna. The Manual and other forum questions I've read suggests doing this with an infinite half plane (exact Sommerfeld…
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Simulation in Altair SIMLAB hangs after 4 days
Hello, I am running a very long simulation on Altair SIMLAB where I use parallel processing to speed up the computation time. Nevertheless, after 4 days my simulation stopped working and hangs, while not giving any error for this issue. I am running a DOE and already 1000+ have run successfully, but then the remaining runs…
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How can I fix this triangular mesh error 2331? Feko V 2025.1
Hello, no matter what surface or geometric body I place in CADfeko via a patch array, there's always a 832, and if I try to fix it, I get a 2331, and that can't be resolved. Only the output file shows the triangles, but in CADfeko I have no chance of getting rid of them—no help entry or AI query has worked so far. The…
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How to construct an infinitely long, z-directed electric line current source in Feko?
Hi, I am learning how to compute the 2D scattering using MoM with the surface equivalence principle (SEP) and a 1D periodic boundary condition (PBC) in Feko. I would like to know whether it is possible to construct an infinitely long, z-directed electric line current source located at $(x_s,y_s)$, $\mathbf{J}(\mathbf{r})=I…
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How to copute the RCS of an infinite long dielectric cylinder?
Hi, I would like to know how to compute the 2D RCS (scattering width) of an infinitely long dielectric cylinder in FEKO. The official example for an infinitely long PEC cylinder removes the top and bottom faces before applying a 1D Periodic Boundary Condition. Should the same procedure be followed for a dielectric…
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Student License Mismatch: Error Code 9 Feature Not Found (HWFEKOGUI)
Hello, I am a student using a university account profile. I have activated my Student Edition using my Activation Key via the License Utility, but the software fails to launch with 'Error Code 9: Feature Not Found (HWFEKOGUI)'. My current license text blocks entirely lack the Feko module flags. Could an Altair…
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newFASANT for FEKO 2026.1
hi please can you inform me if there is appropriate newFASANT installer for the last FEKO 2026.1 kind regards Mitsos
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Unable to open FEKO anymore
Description: Hello, I've been successfully using a FEKO student license since May and it has been working without issue. However, recently, the program stopped running and I received the error detailed below. I had this error earlier while trying to install the program and was able to do it after staff had deactivated and…
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Electrically short HF Monopole - high nearfield result
Hi, I am simulating a monopole to see the electric field at 3m away with the following parameters; 8m long and 0.08m diameter, frequency range 2Mhz to 30Mhz, power 100W, 5dBi gain Approaching the low frequency end ~2Mhz the electric field strength increases significantly. ~ 600 V/m Using hand-calc approximation for…
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How to use optimization mask in FEKO
Hello, I have a couple of questions regarding optimization mask in FEKO. In optimization mask, there are X and Y. Recently, I have watched the video in the following link: https://youtu.be/AxjK4xUl-pM?si=jJZl1ZErpoVoeZuF Where the engineer specified some specific frequencies and s-parameters in X and Y columns,…
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Use SSH FEKO
Hello, I am trying to run FEKO on a server and have two questions : Is it possible to run FEKO simulation on a distant server without having FEKO installed there ? For example, a SSH call need FEKO on the distant machine. I was wondering then if there was an option with MPI or so allowing to execute the simulation on a…
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Student License "Error activating license:This lic. was already activated using different HostIDs"
I startet evaluating Feko yesterday, especially its LUA scripting capabilities. After some hours of scripting, I run into license problems. As it seemed I had some zombie Feko processes running, I tried killing all Feko processes without success. Rebooting did not help as well. Consequently, I checked the license storage…
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What is the recommended way to feed a dipole antenna with a physical gap in Altair Feko when the d
In my model, the dipole is made of cylindrical PEC/metal parts separated by a small gap. I would like to excite the antenna across this gap and obtain reliable input impedance, current distribution, and radiated power results. Should I use a discrete/edge port directly between the two cylindrical faces, a small feeding…
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FEKO .ffe antenna pattern import into WinProp - incorrect power results compared to omnidirectional
Hi, I'm trying to import a 2x2 patch antenna pattern from FEKO (POSTFEKO v2025.1) into WinProp (ProMan) as a .ffe file, but the results are incorrect. Situation: In FEKO/POSTFEKO, the main beam is pointing in the Z-axis direction (upward), with a Total Gain of about 13-17 dBi I exported the far field as a 3D_pattern .ffe…
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Claude AI with FEKO
I have a model for a large platform such as Gulfstream aircraft. I have an antenna on the fuselage. I want Claude to keep moving antenna along fuselage. The problem is the antenna coordinates is not in any files that are easily readable text and same for aircraft geometry. Is there any way around it, is there MCP server i…