diff --git a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
index cabf6f09f..eadf83efb 100644
--- a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
@@ -1355,7 +1355,7 @@ int setVLimit(int val, char *mess) {
 }
 
 int validateDACIndex(enum DACINDEX ind, char *mess) {
-    if (ind < 0 || ind >= NDAC_ONLY) {
+    if (ind >= NDAC_ONLY) {
         sprintf(mess, "Could not set/get DAC. Invalid index %d\n", ind);
         LOG(logERROR, (mess));
         return FAIL;
@@ -1464,7 +1464,7 @@ int setDAC(enum DACINDEX ind, int val, bool mV, char *mess) {
 }
 
 int validatePowerDACIndex(enum powerIndex ind, char *mess) {
-    if (ind < 0 || ind > V_POWER_IO) {
+    if (ind > V_POWER_IO) {
         sprintf(mess, "Could not set/get Power DAC. Invalid index %d\n", ind);
         LOG(logERROR, (mess));
         return FAIL;
@@ -2330,7 +2330,7 @@ int validatePhaseinDegrees(enum CLKINDEX ind, int val, int retval) {
 }
 
 int setFrequency(enum CLKINDEX ind, int val) {
-    if (ind < 0 || ind >= NUM_CLOCKS) {
+    if (ind >= NUM_CLOCKS) {
         LOG(logERROR, ("Unknown clock index %d to set frequency\n", ind));
         return FAIL;
     }
@@ -2380,7 +2380,7 @@ int setFrequency(enum CLKINDEX ind, int val) {
 }
 
 int getFrequency(enum CLKINDEX ind) {
-    if (ind < 0 || ind >= NUM_CLOCKS) {
+    if (ind >= NUM_CLOCKS) {
         LOG(logERROR, ("Unknown clock index %d to get frequency\n", ind));
         return -1;
     }
diff --git a/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c
index 7ccc5baa4..72244a4eb 100644
--- a/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/jungfrauDetectorServer/slsDetectorFunctionList.c
@@ -416,7 +416,7 @@ int setChipIndex(enum CHIPINDEX ind, char *mess) {
 enum CHIPINDEX getChipIndex() { return chipIndex; }
 
 int validateChipIndex(enum CHIPINDEX ind, char *mess) {
-    if (ind < 0 || ind >= NUM_CHIP_INDICES) {
+    if (ind >= NUM_CHIP_INDICES) {
         sprintf(mess, "Invalid chip index %d. Options: %s\n", (int)ind,
                 CHIP_VALS_HELP);
         LOG(logERROR, (mess));
@@ -846,7 +846,7 @@ int getDefaultDac(enum DACINDEX index, enum detectorSettings sett,
         return FAIL;
     }
 
-    if (index < 0 || index >= NDAC)
+    if (index >= NDAC)
         return FAIL;
     *retval = defaultDacValues[index];
     return OK;
@@ -882,7 +882,7 @@ int setDefaultDac(enum DACINDEX index, enum detectorSettings sett, int value) {
         // not a special dac
         return FAIL;
     }
-    if (index < 0 || index >= NDAC)
+    if (index >= NDAC)
         return FAIL;
     LOG(logINFO, ("Setting Default Dac [%d - %s]: %d\n", (int)index,
                   dac_names[index], value));
@@ -1564,7 +1564,7 @@ void setGainMode(enum gainMode mode) {
 
 /* parameters - dac, adc, hv */
 int validateDACIndex(enum DACINDEX ind, char *mess) {
-    if (ind < 0 || ind >= NDAC) {
+    if (ind >= NDAC) {
         sprintf(mess, "Could not set DAC. Invalid index %d\n", ind);
         LOG(logERROR, (mess));
         return FAIL;
diff --git a/slsDetectorServers/moenchDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/moenchDetectorServer/slsDetectorFunctionList.c
index 1b9d7b343..b3cb6fe69 100644
--- a/slsDetectorServers/moenchDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/moenchDetectorServer/slsDetectorFunctionList.c
@@ -548,7 +548,7 @@ int resetToDefaultDacs(int hardReset, char *mess) {
 
 int getDefaultDac(enum DACINDEX index, enum detectorSettings sett,
                   int *retval) {
-    if (index < 0 || index >= NDAC)
+    if (index >= NDAC)
         return FAIL;
     *retval = defaultDacValues[index];
     return OK;
@@ -556,7 +556,7 @@ int getDefaultDac(enum DACINDEX index, enum detectorSettings sett,
 
 int setDefaultDac(enum DACINDEX index, enum detectorSettings sett, int value) {
     char *dac_names[] = {DAC_NAMES};
-    if (index < 0 || index >= NDAC)
+    if (index >= NDAC)
         return FAIL;
     LOG(logINFO, ("Setting Default Dac [%d - %s]: %d\n", (int)index,
                   dac_names[index], value));
@@ -913,7 +913,7 @@ enum detectorSettings getSettings() {
 /* parameters - dac, adc, hv */
 /* parameters - dac, adc, hv */
 int validateDACIndex(enum DACINDEX ind, char *mess) {
-    if (ind < 0 || ind >= NDAC) {
+    if (ind >= NDAC) {
         sprintf(mess, "Could not set DAC. Invalid index %d\n", ind);
         LOG(logERROR, (mess));
         return FAIL;
diff --git a/slsDetectorServers/slsDetectorServer/src/LTC2620_Driver.c b/slsDetectorServers/slsDetectorServer/src/LTC2620_Driver.c
index ee76c5e64..21db6fed1 100644
--- a/slsDetectorServers/slsDetectorServer/src/LTC2620_Driver.c
+++ b/slsDetectorServers/slsDetectorServer/src/LTC2620_Driver.c
@@ -94,16 +94,13 @@ int LTC2620_D_SetDacValue(int dacnum, int val, char *dacname, char *mess) {
     // fname to write to
     char fname[MAX_STR_LENGTH];
     memset(fname, 0, MAX_STR_LENGTH);
-    char fnameFormat[MAX_STR_LENGTH];
-    memset(fnameFormat, 0, MAX_STR_LENGTH);
-    strcpy(fnameFormat, LTC2620_D_DriverFileName);
-    sprintf(fname, "%s%d", fnameFormat, dacnum);
+    snprintf(fname, sizeof(fname), "%s%d", LTC2620_D_DriverFileName, dacnum);
 #if defined(XILINX_CHIPTESTBOARDD)
     if (val == LTC2620_D_PWR_DOWN_VAL) {
-        strcpy(fnameFormat, LTC2620_D_PowerDownDriverFileName);
+        snprintf(fname, sizeof(fname), "%s%d",
+                 LTC2620_D_PowerDownDriverFileName, dacnum);
         val = 1; //-100?:Invalid Argument
     }
-    sprintf(fname, fnameFormat, dacnum);
 #endif
     LOG(logDEBUG1, ("fname %s\n", fname));
 
diff --git a/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.c
index d72fc5f74..04d95fc0b 100644
--- a/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/xilinx_ctbDetectorServer/slsDetectorFunctionList.c
@@ -145,7 +145,7 @@ void basictests() {
     }
 
     // check for API compatibility - old server
-    if (sw_fw_apiversion > requiredfwversion) {
+    if ((uint64_t)sw_fw_apiversion > requiredfwversion) {
         sprintf(initErrorMessage,
                 "This firmware-software api version (0x%lx) is incompatible "
                 "with the software's minimum required firmware version "
@@ -158,7 +158,7 @@ void basictests() {
     }
 
     // check for firmware compatibility - old firmware
-    if (requiredfwversion > fwversion) {
+    if (requiredfwversion > (uint64_t)fwversion) {
         sprintf(initErrorMessage,
                 "This firmware version (0x%lx) is incompatible.\n"
                 "Please update firmware (min. 0x%lx) to be compatible with "