There are two popular variants of the Holt-Winters forecasting method; RRDtool

[rrdtool.git] / src / rrd_tune.c

diff --git a/src/rrd_tune.c b/src/rrd_tune.c
index 91f6409..160b32a 100644 (file)
--- a/src/rrd_tune.c
+++ b/src/rrd_tune.c
@@ -237,14 +237,20 @@ int rrd_tune(
             break;
         case 'x':
             if (set_hwarg(&rrd, CF_HWPREDICT, RRA_hw_alpha, optarg)) {
-                rrd_free(&rrd);
-                return -1;
+                if (set_hwarg(&rrd, CF_MHWPREDICT, RRA_hw_alpha, optarg)) {
+                    rrd_free(&rrd);
+                    return -1;
+                }
+                rrd_clear_error();
             }
             break;
         case 'y':
             if (set_hwarg(&rrd, CF_HWPREDICT, RRA_hw_beta, optarg)) {
-                rrd_free(&rrd);
-                return -1;
+                if (set_hwarg(&rrd, CF_MHWPREDICT, RRA_hw_beta, optarg)) {
+                    rrd_free(&rrd);
+                    return -1;
+                }
+                rrd_clear_error();
             }
             break;
         case 'z':