From d0b925901810bc0840f39b57ec4f2df419805675 Mon Sep 17 00:00:00 2001
From: dwarning <dwarning>
Date: Thu, 10 Aug 2017 22:14:04 +0200
Subject: [PATCH] catch noise sweeps with 1 point and handle erronous 0 points

---
 src/spicelib/analysis/noisean.c  |  5 ++++-
 src/spicelib/analysis/nsetparm.c | 10 +++++++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/spicelib/analysis/noisean.c b/src/spicelib/analysis/noisean.c
index 22b1abc3a..8374691d4 100644
--- a/src/spicelib/analysis/noisean.c
+++ b/src/spicelib/analysis/noisean.c
@@ -284,7 +284,10 @@ NOISEan (CKTcircuit *ckt, int restart)
                 break;
 
             case LINEAR:
-                data->freq += job->NfreqDelta;
+                if (job->NfreqDelta > 1e-6)
+                    data->freq += job->NfreqDelta;
+                else
+                    data->freq += (job->NfreqDelta+job->NstartFreq*ckt->CKTreltol);
                 break;
 
             default:
diff --git a/src/spicelib/analysis/nsetparm.c b/src/spicelib/analysis/nsetparm.c
index 264f22649..46fe33c1c 100644
--- a/src/spicelib/analysis/nsetparm.c
+++ b/src/spicelib/analysis/nsetparm.c
@@ -45,7 +45,15 @@ NsetParm(CKTcircuit *ckt, JOB *anal, int which, IFvalue *value)
         break;
 
     case N_STEPS:
-        job->NnumSteps = value->iValue;
+        if ((job->NstpType == LINEAR) && (value->iValue < 1)) {
+            errMsg = copy("Linear sweep at least 1 points");
+            return(E_PARMVAL);
+        }
+        if ((job->NstpType == LINEAR) && (value->iValue == 1)) {
+            job->NnumSteps = 2;
+        } else {
+            job->NnumSteps = value->iValue;
+        }
         break;
 
     case N_START: