# LL2XY\_LAM error because truelat1 and truelat2 are the same

**URL:** https://forum.cmascenter.org/t/ll2xy-lam-error-because-truelat1-and-truelat2-are-the-same/5402
**Category:** MCIP
**Created:** [December 2, 2024, 9:02am UTC](https://forum.cmascenter.org/t/ll2xy-lam-error-because-truelat1-and-truelat2-are-the-same/5402 "2024-12-02T09:02:30Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![TJDOFLEARN](https://avatars.discourse-cdn.com/v4/letter/t/b19c9b/32.png) [@TJDOFLEARN](https://forum.cmascenter.org/u/TJDOFLEARN)
#### Post date: [December 2, 2024, 9:02am UTC](https://forum.cmascenter.org/t/ll2xy-lam-error-because-truelat1-and-truelat2-are-the-same/5402/1 "2024-12-02T09:02:30Z")

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![172095c8e04a6360fc99572a256f1ac](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/1/11adb9abd5ea2740854ea7e345418a8f74d7a41a.png)  
my wrfout-put data time during a month.Whther have methods to solve the issue

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### Author: ![foley.kristen](https://avatars.discourse-cdn.com/v4/letter/f/d9b06d/32.png) [@foley.kristen](https://forum.cmascenter.org/u/foley.kristen)
#### Post date: [December 4, 2024, 10:18pm UTC](https://forum.cmascenter.org/t/ll2xy-lam-error-because-truelat1-and-truelat2-are-the-same/5402/2 "2024-12-04T22:18:57Z")

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Greetings, please see this post with information about this case: [Fix Lambert Conformal Conic (Tangent Case) by ramespada · Pull Request #192 · USEPA/CMAQ · GitHub](https://github.com/USEPA/CMAQ/pull/192)

I’m also flagging @tlspero for awareness.

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### Author: ![tlspero](https://avatars.discourse-cdn.com/v4/letter/t/bb73d2/32.png) [@tlspero](https://forum.cmascenter.org/u/tlspero)
#### Post date: [December 5, 2024, 7:29pm UTC](https://forum.cmascenter.org/t/ll2xy-lam-error-because-truelat1-and-truelat2-are-the-same/5402/3 "2024-12-05T19:29:53Z")

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@TJDOFLEARN –

I have a new version of the routine, and it largely follows the GitHub Issue that @foley.kristen pointed to you. I attached it here. You will need to change the file name to remove the “.txt” extension. You will also need to modify the Makefile to remove the compiling of ll2xy\_lam\_sec.f90 and ll2xy\_lam\_tan.f90.This code should be included in a forthcoming release.

–Tanya  
[ll2xy\_lam.f90.txt](https://forum.cmascenter.org/uploads/short-url/cvn1NJ48Lg1yjgZaJXLldef2qQ1.txt) (7.7 KB)