Avoid error in updateParametersInContext() when there are no exceptions (#5209)

122dbde2 · Peter Eastman · GitHub · 4ab645ea · 122dbde2
Unverified Commit 122dbde2 authored Feb 10, 2026 by Peter Eastman Committed by GitHub Feb 10, 2026
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platforms/common/src/CommonCalcNonbondedForce.cpp platforms/common/src/CommonCalcNonbondedForce.cpp +1 -1

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--- a/platforms/common/src/CommonCalcNonbondedForce.cpp
+++ b/platforms/common/src/CommonCalcNonbondedForce.cpp
@@ -1188,7 +1188,7 @@ void CommonCalcNonbondedForceKernel::copyParametersToContext(ContextImpl& contex
    // Record the exceptions.
-    if (firstException <= lastException) {
+    if (firstException <= lastException && numExceptions > 0) {
        vector<mm_float4> baseExceptionParamsVec(numExceptions);
        for (int i = 0; i < numExceptions; i++) {
            int particle1, particle2;