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diff --git a/refnx/analysis/objective.py b/refnx/analysis/objective.py
index 9ff56057..c77139ad 100644
--- a/refnx/analysis/objective.py
+++ b/refnx/analysis/objective.py
@@ -674,8 +674,8 @@ class Objective(BaseObjective):
         logl += (y - model) ** 2 / var_y
 
         # nans play havoc
-        if np.isnan(logl).any():
-            raise RuntimeError("Objective.logl encountered a NaN.")

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Investigating use of openmp on macOS for Python related things

This assumes you have installed the command line tools on macOS. The first two sections look into installing OpenMP from scratch. However, on macOS it might be easier just to use homebrew.

Install cmake

1. Download source from https://github.com/Kitware/CMake/releases/download/v3.15.1/cmake-3.15.1.tar.gz (there may be a later release).
2. Untar the files: tar xzvf cmake-3.15.1.tar.gz

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Function/S wottpy(r0, d0)
    variable r0, d0
	// Paths must be POSIX paths (using /).
	// Paths containing spaces or other nonstandard characters
	// must be single-quoted. See Apple Techical Note TN2065 for
	// more on shell scripting via AppleScript.
	
	string r0s, d0s
	r0s = num2str(r0)
	d0s = num2str(d0)

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